JavaScript supports the following comparison operators −
Assume variable A holds 10 and variable B holds 20, then −
1. = = (Equal)
Checks if the value of two operands is equal or not, if yes, then the condition becomes true.
Ex: (A == B) is not true.
2. != (Not Equal)
Checks if the value of two operands is equal or not, if the values are not equal, then the condition becomes true.
Ex: (A != B) is true.
3. > (Greater than)
Checks if the value of the left operand is greater than the value of the right operand, if yes, then the condition becomes true.
Ex: (A > B) is not true.
4. < (Less than)
Checks if the value of the left operand is less than the value of the right operand, if yes, then the condition becomes true.
Ex: (A < B) is true.
5. >= (Greater than or Equal to)
Checks if the value of the left operand is greater than or equal to the value of the right operand, if yes, then the condition becomes true.
Ex: (A >= B) is not true.
6. <= (Less than or Equal to)
Checks if the value of the left operand is less than or equal to the value of the right operand, if yes, then the condition becomes true.
Ex: (A <= B) is true.
Example
<html>
<body>
<h1>Comparison Operators</h1><br/>
<script type="text/javascript">
var a = 10;
var b = 20;
var linebreak = "<br />";
document.write("(a == b) => ");
result = (a == b);
document.write(result);
document.write(linebreak);
document.write("(a < b) => ");
result = (a < b);
document.write(result);
document.write(linebreak);
document.write("(a > b) => ");
result = (a > b);
document.write(result);
document.write(linebreak);
document.write("(a != b) => ");
result = (a != b);
document.write(result);
document.write(linebreak);
document.write("(a >= b) => ");
result = (a >= b);
document.write(result);
document.write(linebreak);
document.write("(a <= b) => ");
result = (a <= b);
document.write(result);
document.write(linebreak);
</script>
Set the variables to different values and different operators and then try...
</body>
</html>
Output
(a == b) => false
(a < b) => true
(a > b) => false
(a != b) => true
(a >= b) => false
a <= b) => true
Set the variables to different values and different operators and then try...
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