JavaScript Comments

JavaScript comments can be used to explain JavaScript code and it can also be used to prevent execution, when testing alternative code.

Two Types of Comments in Javascript.

  • Single Line Comments
  • Multi Line Comments

 

Single Line Comments

Single line comments start with //.

Any text between // and the end of the line will be ignored by JavaScript (will not be executed).

This example uses a single line comment at the end of each line to explain the code:

 

Multi-line Comments

Multi-line comments start with /* and end with */.

Any text between /* and */ will be ignored by JavaScript.

This example uses a multi-line comment (a comment block) to explain the code:

 

 

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