JavaScript

Comparison Operators

A comparison operator compares its operands based on standard lexicographical ordering, using Unicode values. It returns a logical value based on whether the comparison is true. The operands can be numerical or string values.

Operator	Name	Description. Returns true if:	True if a = 2, b = 5:
`==`	Equal	The operands are equal. If they are not of the same type, JavaScript tries to convert them to an appropriate type for the comparison.	2 == a 2 == '2' "2" == a
`!=`	Not equal	The operands are not equal. If they are not of the same type, JavaScript tries to convert them to an appropriate type for the comparison.	a != 5 b != "2"
`===`	Strict equal	The operands are equal and of the same type.	2 === a
`!==`	Strict not equal	The operands are not equal and/or not of the same type.	a !== "2" 2 !== '2'
`>`	Greater than	The left operand is greater than the right operand.	b > a
`>=`	Greater than or equal	The left operand is greater than or equal to the right operand.	b >= a a >= 2
`<`	Less than	The left operand is less than the right operand.	a < b
`<=`	Less than or equal	The left operand is less than or equal to the right operand.	a <= b b <= 5

For example:


var a=2;

var b=5;

if (a == b)

{

document.writeln("Behold! a and b are the same!");

}

The coode fragment above would cause no alert, whereas the code fragment below would


var c=5;

var d=5;

if (c == d)

{

document.writeln("Behold! c and d are the same!");

}

Click here to see more about if and else statements.