Replacing spaces with underscores in JavaScript?

Let’s say the following is our string −

var sentence = "My Name is David Miller I live in AUS";

To replace spaces in the above string with underscore, use split() along with join().

Example

Following is the code −

var sentence = "My Name is David Miller I live in AUS";
var withUnderscore = sentence.split(' ').join('_');
console.log("The actual result=")
console.log(sentence);
console.log("After replacing the space with underscore=")
console.log(withUnderscore);

To run the above program, you need to use below command which is as follows −

node fileName.js

Here, my file name is demo250.js.

Output

This will produce the following output on console −

PS C:\Users\Amit\javascript-code> node demo250.js
The actual result=
My Name is David Miller I live in AUS
After replacing the space with underscore=
My_Name_is_David_Miller_I_live_in_AUS