{"id":261564,"date":"2024-04-07T16:39:14","date_gmt":"2024-04-07T16:39:14","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/?p=261564"},"modified":"2024-04-07T16:39:14","modified_gmt":"2024-04-07T16:39:14","slug":"what-do-you-mean-by-call-by-value-in-c","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/","title":{"rendered":"What do you mean by call by value in C++?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_62 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#What_do_you_mean_by_call_by_value_in_C\" title=\"What do you mean by call by value in C++?\">What do you mean by call by value in C++?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#FAQs\" title=\"FAQs:\">FAQs:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#1_What_happens_when_a_function_is_called_by_value\" title=\"1. What happens when a function is called by value?\">1. What happens when a function is called by value?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#2_How_are_parameters_passed_by_value_in_C\" title=\"2. How are parameters passed by value in C++?\">2. How are parameters passed by value in C++?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#3_Can_changes_made_to_parameters_inside_the_called_function_affect_the_original_values_of_the_arguments\" title=\"3. Can changes made to parameters inside the called function affect the original values of the arguments?\">3. Can changes made to parameters inside the called function affect the original values of the arguments?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#4_How_does_call_by_value_affect_the_performance_of_a_program\" title=\"4. How does call by value affect the performance of a program?\">4. How does call by value affect the performance of a program?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#5_Does_call_by_value_support_passing_arrays_as_arguments\" title=\"5. Does call by value support passing arrays as arguments?\">5. Does call by value support passing arrays as arguments?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#6_Is_it_possible_to_modify_the_original_argument_value_within_a_function_called_by_value\" title=\"6. Is it possible to modify the original argument value within a function called by value?\">6. Is it possible to modify the original argument value within a function called by value?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#7_Can_call_by_value_be_used_to_pass_objects_as_arguments\" title=\"7. Can call by value be used to pass objects as arguments?\">7. Can call by value be used to pass objects as arguments?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#8_What_happens_if_the_argument_passed_to_a_function_called_by_value_is_modified_inside_the_function\" title=\"8. What happens if the argument passed to a function called by value is modified inside the function?\">8. What happens if the argument passed to a function called by value is modified inside the function?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#9_Can_call_by_value_cause_any_side_effects\" title=\"9. Can call by value cause any side effects?\">9. Can call by value cause any side effects?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#10_Can_call_by_value_be_used_to_return_multiple_values_from_a_function\" title=\"10. Can call by value be used to return multiple values from a function?\">10. Can call by value be used to return multiple values from a function?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#11_Are_there_any_drawbacks_of_using_call_by_value\" title=\"11. Are there any drawbacks of using call by value?\">11. Are there any drawbacks of using call by value?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#12_Can_call_by_value_be_used_to_pass_large_data_structures\" title=\"12. Can call by value be used to pass large data structures?\">12. Can call by value be used to pass large data structures?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_do_you_mean_by_call_by_value_in_C\"><\/span>What do you mean by call by value in C++?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\n**Call by value** is a parameter passing mechanism in C++ where a copy of the argument value is passed to the called function. This means any changes made to the parameter inside the called function will not affect the original value of the argument.<\/p>\n<p>Call by value is the default parameter passing mechanism in C++, which means that when a function is called, the values of the arguments are copied into the function&#8217;s parameters.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"1_What_happens_when_a_function_is_called_by_value\"><\/span>1. What happens when a function is called by value?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nWhen a function is called by value, a copy of the argument&#8217;s value is made and passed to the function.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_How_are_parameters_passed_by_value_in_C\"><\/span>2. How are parameters passed by value in C++?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nIn C++, parameters are passed by value by default. The values of the arguments are copied into the function&#8217;s parameters.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Can_changes_made_to_parameters_inside_the_called_function_affect_the_original_values_of_the_arguments\"><\/span>3. Can changes made to parameters inside the called function affect the original values of the arguments?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nNo, changes made to parameters inside the called function do not affect the original values of the arguments since the function operates on the copies of the values.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_How_does_call_by_value_affect_the_performance_of_a_program\"><\/span>4. How does call by value affect the performance of a program?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nCall by value can have a slight impact on performance since every time a function is called, a copy of the argument&#8217;s value needs to be made.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Does_call_by_value_support_passing_arrays_as_arguments\"><\/span>5. Does call by value support passing arrays as arguments?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, call by value can be used to pass arrays as arguments in C++. However, the function will still receive a copy of the array, not the original.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_Is_it_possible_to_modify_the_original_argument_value_within_a_function_called_by_value\"><\/span>6. Is it possible to modify the original argument value within a function called by value?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nNo, it is not possible to modify the original argument value within a function called by value since changes made to the parameters only affect local copies.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_Can_call_by_value_be_used_to_pass_objects_as_arguments\"><\/span>7. Can call by value be used to pass objects as arguments?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nYes, call by value can be used to pass objects as arguments. However, the function will work on a copy of the passed object, not the original.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"8_What_happens_if_the_argument_passed_to_a_function_called_by_value_is_modified_inside_the_function\"><\/span>8. What happens if the argument passed to a function called by value is modified inside the function?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nModifications made to the argument inside the function will not affect its original value since the function operates on a copy of the value.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"9_Can_call_by_value_cause_any_side_effects\"><\/span>9. Can call by value cause any side effects?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nCall by value generally does not cause any side effects, as modifications made to the parameter inside the function do not affect the original values.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"10_Can_call_by_value_be_used_to_return_multiple_values_from_a_function\"><\/span>10. Can call by value be used to return multiple values from a function?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nNo, call by value cannot be directly used to return multiple values from a function. To return multiple values, other techniques like using pointers or references need to be employed.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"11_Are_there_any_drawbacks_of_using_call_by_value\"><\/span>11. Are there any drawbacks of using call by value?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nOne drawback of using call by value is that it requires more memory since copies of the values need to be made for every function call.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"12_Can_call_by_value_be_used_to_pass_large_data_structures\"><\/span>12. Can call by value be used to pass large data structures?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\nWhile call by value can technically be used to pass large data structures, it is generally inefficient since it involves making a full copy of the data. Using call by reference or call by pointer is usually preferred for passing large data structures.<\/p>\n<p>In conclusion, call by value in C++ is the default parameter passing mechanism where a copy of the argument value is passed to the function. This mechanism ensures that modifications made to the parameters inside the function do not affect the original values of the arguments. While call by value is suitable for simple data types, other techniques like call by reference or call by pointer should be considered for more complex scenarios.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What do you mean by call by value in C++? **Call by value** is a parameter passing mechanism in C++ where a copy of the argument value is passed to the called function. This means any changes made to the parameter inside the called function will not affect the original value of the argument. Call &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"What do you mean by call by value in C++?\" class=\"read-more button\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/#more-261564\">Read more<span class=\"screen-reader-text\">What do you mean by call by value in C++?<\/span><\/a><\/p>\n","protected":false},"author":66,"featured_media":107420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86279],"tags":[],"class_list":["post-261564","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What do you mean by call by value in C++?<\/title>\n<meta name=\"description\" content=\"What do you mean by call by value in C++? **Call by value** is a parameter passing mechanism in C++ where a copy of the argument value is passed to the\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/namso-gen.co\/blog\/what-do-you-mean-by-call-by-value-in-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What do you mean by call by value in C++?\" \/>\n<meta property=\"og:description\" content=\"What do you mean by call by value in C++? 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