JavaScript Comparison

Comparison operators are used to compare two values.

Comparison Operators

Comparison operators are used to compare two values.

Comparison operators always return true or false.

Given that x = 5, the table below explains the comparison operators:

Operator	Description	Comparing	Returns
==	equal to	x == 8	false	Try it
		x == 5	true	Try it
		x == "5"	true	Try it
===	equal value and equal type	x === 5	true	Try it
		x === "5"	false	Try it
!=	not equal	x != 8	true	Try it
!==	not equal value or not equal type	x !== 5	false	Try it
		x !== "5"	true	Try it
		x !== 8	true	Try it
>	greater than	x > 8	false	Try it
=	greater than or equal to	x >= 8	false	Try it

Comparison operators can be used in conditional statements to compare values and take action depending on the result:

Example

Example Code

javascript

Try it Yourself

if (age   "John" | false | [Try it ](tryit.asp?filename=tryjs_comparison_24) |
| 2 == "John" | false | [Try it ](tryit.asp?filename=tryjs_comparison_25) |
| "2"   "12" | true | [Try it ](tryit.asp?filename=tryjs_comparison_27) |
| "2" == "12" | false | [Try it ](tryit.asp?filename=tryjs_comparison_28) |

When comparing two strings, "2" will be greater than "12".

Alphabetically 1 is less than 21.

To secure a proper result, variables should be converted to the proper type before comparison:

### Example

javascript age = Number(age);

if (isNaN(age)) {

voteable = "Input is not a number";

} else {

voteable = (age < 18) ? "Too young" : "Old enough";

} ```

Interactive Code Examples

Example 1

javascript

Try it Yourself

JavaScript syntax and algorithm demonstration.

if (age < 18) text = "Too young to buy alcohol";

JS Example 2

javascript

Try it Yourself

JavaScript syntax and algorithm demonstration.

let text1 = "A";

let text2 = "B";

let result = text1 < text2;

JS Example 3

javascript

Try it Yourself

JavaScript syntax and algorithm demonstration.

let text1 = "20";

let text2 = "5";

let result = text1 < text2;

JS Example 4

javascript

Try it Yourself

JavaScript syntax and algorithm demonstration.

age = Number(age);

if (isNaN(age)) {

  voteable = "Input is not a number";

} else {

    voteable = (age < 18) ? "Too young" : "Old enough";

}

Previous: JavaScript Assignment Next: JavaScript Conditionals