<\/span><\/h2>\nTo get input values in Node.js, you can utilize the process.argv array or utilize packages like readline-sync or inquirer, which provide interactive command-line prompts and input handling.<\/b><\/p>\n
Using the process.argv Array:
\nThe process.argv array allows you to access command-line arguments passed to your Node.js application. By utilizing this array, you can extract user input values from the command line.<\/p>\n
Here is an example of how to use the process.argv array to get input values:<\/p>\n
“`
\n\/\/ Example usage: node app.js John 25
\nconst name = process.argv[2];
\nconst age = process.argv[3];<\/p>\n
console.log(`Name: ${name}`);
\nconsole.log(`Age: ${age}`);
\n“`<\/p>\n
In the above example, we extract the first command-line argument as the name and the second command-line argument as the age. Running the script with `node app.js John 25` will output:<\/p>\n
“`
\nName: John
\nAge: 25
\n“`<\/p>\n
Using the readline-sync Package:
\nThe readline-sync package allows you to interact with the user through the command line by providing prompts and retrieving input values.<\/p>\n
To use the readline-sync package, you need to install it first by running `npm install readline-sync`. Once installed, you can utilize it in your code, as shown in the following example:<\/p>\n
“`
\nconst readlineSync = require(‘readline-sync’);<\/p>\n
const name = readlineSync.question(‘What is your name? ‘);
\nconst age = readlineSync.questionInt(‘What is your age? ‘);<\/p>\n
console.log(`Name: ${name}`);
\nconsole.log(`Age: ${age}`);
\n“`<\/p>\n
In the above example, readlineSync.question prompts the user for their name, while readlineSync.questionInt prompts for their age as an integer. The obtained values are then displayed on the console.<\/p>\n
Using the inquirer Package:
\nThe inquirer package is another popular option for obtaining user input in Node.js. It provides a more interactive and feature-rich experience for command-line prompts.<\/p>\n
To use the inquirer package, you need to install it by running `npm install inquirer`. Here is an example that demonstrates its usage:<\/p>\n
“`
\nconst inquirer = require(‘inquirer’);<\/p>\n
inquirer.prompt([
\n {
\n name: ‘name’,
\n message: ‘What is your name?’,
\n },
\n {
\n name: ‘age’,
\n message: ‘What is your age?’,
\n },
\n])
\n.then(answers => {
\n console.log(`Name: ${answers.name}`);
\n console.log(`Age: ${answers.age}`);
\n});
\n“`<\/p>\n
In this example, inquirer.prompt displays two prompts for the name and age. The user inputs are obtained in the `answers` object, which is then used to display the name and age on the console.<\/p>\n