Math Object

Printing PI value (3.14)

            
console.log(Math.PI); // 3.141592653589793 
            
           

Math.round()

• Math.round(x) returns the value of x rounded to its nearest integer.

                
let num = 10.501;
console.log(Math.round(num)); // 11
                
            

Math.pow()

• Math.pow(x, y) returns the value of x to the power y.

                
console.og(Math.pow(2, 3)); // 8
console.og(2**3); // 8
                
            

Math.sqrt()

• Math.sqrt(x) returns the square root of x.

                
console.log(Math.sqrt(25)); // 5
console.log(Math.sqrt(81)); // 9
                
            

Math.abs()

• Math.abs(x) returns the absolute (positive) value of x.

                
                    console.log(Math.abs(-55)); // 55
                    console.log(Math.abs(-55.5)); // -55.5
                
            

Math.ceil()

• Math.ceil(x) returns the value of x rounded up to its nearest integer.

                
console.log(Math.ceil(4.51)); // 5
console.log(Math.round(4.51)); // 5
console.log(Math.ceil(99.01)); // 100
console.log(Math.round(99.1)); // 99
                
            

Math.floor()

• Math.floor(x) returns the value of x rounded down to its nearest integer.

                
console.log(Math.floor(99.01)); // 99
console.log(Math.floor(99.1)); // 99
                
            

Math.min()

• Math.min() can be used to find the lowest value in a list of arguments.

                
console.log(Math.min(0, 150, 30, 20, -8, -200)); // -200
                
            

Math.max()

• Math.max() can be used to find the highest value in a list of arguments

                
console.log(Math.max(0, 150, 30, 20, -8, -200)); // 150
                
            

Math.trunc()

• The trunc() method returns the integer part of a number.

                
console.log(Math.trunc(4.6)); // 4
console.log(Math.trunc(-99.1)); // -99
                
            

Practise time ⌣

• If the argument is a positive number, Math.trunc() is equivalent to Math.floor(), otherwise Math.trunc() is equivalent to Math.ceil().