{"id":211686,"date":"2025-02-11T02:58:23","date_gmt":"2025-02-11T02:58:23","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/is-javascript-call-by-value\/"},"modified":"2025-02-11T02:58:23","modified_gmt":"2025-02-11T02:58:23","slug":"is-javascript-call-by-value","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/is-javascript-call-by-value\/","title":{"rendered":"Is JavaScript call by value?"},"content":{"rendered":"

In the world of programming, there is an ongoing debate about whether JavaScript is a call by value or call by reference language. To understand this concept, let’s break down exactly what call by value means in the context of JavaScript.<\/p>\n

Call by value refers to the passing of arguments to a function by value, meaning that a copy of the actual value is passed to the function. This copy is distinct from the original value, and any changes made to it within the function do not affect the original value outside the function. <\/p>\n

In JavaScript, primitive data types such as numbers, strings, and booleans are passed by value. This means that when a variable holding a primitive value is passed to a function, a copy of that value is created within the function.<\/p>\n

On the other hand, objects and arrays in JavaScript are passed by reference. This means that when an object or array is passed to a function, the reference to the actual object or array is passed, not a copy of it. This can lead to confusion for those expecting call by value behavior in all cases.<\/p>\n

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