Which of the following symbol is used for multiple line comments in javascript?

JavaScript comments can be used to explain JavaScript code, and to make it more readable.

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

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 before each code line:

Example

// Change heading:
document.getElementById("myH").innerHTML = "My First Page";

// Change paragraph:
document.getElementById("myP").innerHTML = "My first paragraph.";

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

Example

let x = 5;      // Declare x, give it the value of 5
let y = x + 2;  // Declare y, give it the value of x + 2

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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:

Example

/*
The code below will change
the heading with id = "myH"
and the paragraph with id = "myP"
in my web page:
*/
document.getElementById("myH").innerHTML = "My First Page";
document.getElementById("myP").innerHTML = "My first paragraph.";

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It is most common to use single line comments.
Block comments are often used for formal documentation.

Using Comments to Prevent Execution

Using comments to prevent execution of code is suitable for code testing.

Adding // in front of a code line changes the code lines from an executable line to a comment.

This example uses // to prevent execution of one of the code lines:

Example

//document.getElementById("myH").innerHTML = "My First Page";
document.getElementById("myP").innerHTML = "My first paragraph.";

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This example uses a comment block to prevent execution of multiple lines:

Example

/*
document.getElementById("myH").innerHTML = "My First Page";
document.getElementById("myP").innerHTML = "My first paragraph.";
*/

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• Talent
• Javascript
• Forum
• Which symbol is used for comments in Javascript?

Write for both single and multi line comment

• Shubham
• 15 Jul
• 19 Answers

• Providing comments is good habbit of programming, which helps other developer to understand the code or logic written.
  For example if we are writting any comments for variable declaration or brief info then we can use Single line comment.
  //count indicates the starting point ( its single line of comments)
  var count = 0;

  Multiline comments.
  /**
   * Its multiline comment example 
   * It will be helpfull for others, what your code is doing.
   * It is easy to read. any we can provide logic info.
   * response{ [Object] } indicates the  array object
   * response getting from any service call or locally
   * Similary here you can specify for other parts.
   */
  function getTotalCount(response){
  var count = 0;
  for(var value = 0; value < response.lenght; value++ ){
       count = count + response["itemsCount"];
  }
  }

  ---

• // FOR SINGLE LINE, /*  */ FOR MULTI LINE

  ---

• //  for single line and  /* */ for multiline

  ---

• Single Line Comment:  //
  Multi Line Comments:  /*  */

  ---

• To create a single line comment in JavaScript, you place two slashes "//" in front of the code or text you wish to have the JavaScript interpreter ignore. When you place these two slashes, all text to the right of them will be ignored, until the next line.

  1.Multiple-line C-style comments. Everything between /* and */ is a comment, for example:
  /* This is a comment */ /* C-style comments can span as many lines as you like, as shown in this example */

  2.One-line comments of C++ style. These comments begin with // and continue up to the next line break:
  // This is a one-line comment

  3.One-line comments with the HTML comment-opening sequence (). Consider this example:
  This is also a one-line JS comment because JS ignores the closing characters of HTML-style comments

  ---

• Mainly 3 symbols are use for comments in JavaScript -1 multiline comments /* */ 2- single line of C++ style // 3- single line

Which symbol is used for multiline comment in JavaScript?

Which symbols are used for comments in JavaScript?

How many multi line comments are written in JavaScript?

What are the two types of comments in JavaScript?