JavaScript Math Object

The JavaScript math object provides several constants and methods to perform mathematical operation. Unlike date object, it doesn't have constructors.

Math.sqrt(n)

The JavaScript math.sqrt(n) method returns the square root of the given number.

1. Square Root of 17 is: <span id="p1"></span>    
2. <script>    
3. document.getElementById('p1').innerHTML=Math.sqrt(17);    
4. </script>    

Output:

Square Root of 17 is: 4.123105625617661

Math.random()

The JavaScript math.random() method returns the random number between 0 to 1.

1. Random Number is: <span id="p2"></span>    
2. <script>    
3. document.getElementById('p2').innerHTML=Math.random();    
4. </script>   

Output:

Random Number is: 0.6886002826504409

Math.pow(m,n)

The JavaScript math.pow(m,n) method returns the m to the power of n that is mⁿ.

1. 3 to the power of 4 is: <span id="p3"></span>    
2. <script>    
3. document.getElementById('p3').innerHTML=Math.pow(3,4);    
4. </script>    

Output:

3 to the power of 4 is: 81

Math.floor(n)

The JavaScript math.floor(n) method returns the lowest integer for the given number. For example 3 for 3.7, 5 for 5.9 etc.

1. Floor of 4.6 is: <span id="p4"></span>    
2. <script>    
3. document.getElementById('p4').innerHTML=Math.floor(4.6);    
4. </script>    

Output:

Floor of 4.6 is: 4

Math.ceil(n)

The JavaScript math.ceil(n) method returns the largest integer for the given number. For example 4 for 3.7, 6 for 5.9 etc.

1. Ceil of 4.6 is: <span id="p5"></span>    
2. <script>    
3. document.getElementById('p5').innerHTML=Math.ceil(4.6);    
4. </script>    

Output:

Ceil of 4.6 is: 5

Math.round(n)

The JavaScript math.round(n) method returns the rounded integer nearest for the given number. If fractional part is equal or greater than 0.5, it goes to upper value 1 otherwise lower value 0. For example 4 for 3.7, 3 for 3.3, 6 for 5.9 etc.

1. Round of 4.3 is: <span id="p6"></span><br>    
2. Round of 4.7 is: <span id="p7"></span>    
3. <script>    
4. document.getElementById('p6').innerHTML=Math.round(4.3);   
5. document.getElementById('p7').innerHTML=Math.round(4.7);    
6. </script>    

Output:

Round of 4.3 is: 4
Round of 4.7 is: 5

Math.abs(n)

The JavaScript math.abs(n) method returns the absolute value for the given number. For example 4 for -4, 6.6 for -6.6 etc.

1. Absolute value of -4 is: <span id="p8"></span>      
2. <script>      
3. document.getElementById('p8').innerHTML=Math.abs(-4);      
4. </script>   

Output:

Absolute value of -4 is: 4