JavaScript Conditional statements

JavaScript random() Methods

February 03, 2021

 


Math Object

The Math object allows you to perform mathematical tasks.

Math is not a constructor. All properties/methods of Math can be called by using Math as an object, without creating it:

Math Object Methods

MethodDescription
abs(x)Returns the absolute value of x
acos(x)Returns the arccosine of x, in radians
acosh(x)Returns the hyperbolic arccosine of x
asin(x)Returns the arcsine of x, in radians
asinh(x)Returns the hyperbolic arcsine of x
atan(x)Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians
atan2(y, x)Returns the arctangent of the quotient of its arguments
atanh(x)Returns the hyperbolic arctangent of x
cbrt(x)Returns the cubic root of x
ceil(x)Returns x, rounded upwards to the nearest integer
clz32(x)Returns the number of leading zeros in a 32-bit binary representation of x
cos(x)Returns the cosine of x (x is in radians)
cosh(x)Returns the hyperbolic cosine of x
exp(x)Returns the value of Ex
expm1(x)Returns the value of Ex minus 1
floor(x)Returns x, rounded downwards to the nearest integer
fround(x)Returns the nearest (32-bit single precision) float representation of a number
log(x)Returns the natural logarithmof x
log10(x)Returns the base-10 logarithm of x
log1p(x)Returns the natural logarithm of 1 + x
log2(x)Returns the base-2 logarithm of x
max(x, y, z, ..., n)Returns the number with the highest value
min(x, y, z, ..., n)Returns the number with the lowest value
pow(x, y)Returns the value of x to the power of y
random()Returns a random number between 0 and 1
round(x)Rounds x to the nearest integer
sign(x)Returns the sign of a number (checks whether it is positive, negative or zero)
sin(x)Returns the sine of x (x is in radians)
sinh(x)Returns the hyperbolic sine of x
sqrt(x)Returns the square root of x
tan(x)Returns the tangent of an angle
tanh(x)Returns the hyperbolic tangent of a number
trunc(x)Returns the integer part of a number (x)

Math.ceil() :  Definition and Usage 

The Math.ceil() method rounds a number UPWARDS to the nearest integer, and returns the result.


    <script>
            var a = Math.ceil(9.2);
            document.write(a);
    </script>


Math.floor() :  Definition and Usage 

The Math.floor() method rounds a number DOWNWARDS to the nearest integer, and returns the result.


    <script>
            var a = Math.floor(7.9);
            document.write(a);
    </script>

Math.round() :  Definition and Usage 

The Math.round() method rounds a number to the nearest, after .dot integer. Note: 2.49 will be rounded down (2), and 2.5 will be rounded up (3).


    <script>
            var a = Math.round(2.50);
            document.write(a);
    </script>

Math.trunc() :  Definition and Usage 

The Math.trunc() method returns the integer part of a number, it could not render after . value

Note: This method will NOT round the number up/down to the nearest integer, but simply remove the decimals.


    <script>
            var a = Math.round(9.458);
            document.write(a);
    </script>


Math.max() :  Definition and Usage 

The Math.max() method returns the number with the highest value. Tip: Math.min() returns the number with the lowest value.


    <script>
            var a = Math.max(4,9,7,8);
            document.write(a);
    </script>

Math.min() :  Definition and Usage 

The Math.min() method returns the number with the lowest value. Tip: Math.max() returns the number with the highest value.


    <script>
            var a = Math.min(74,9,7,99);
            document.write(a);
    </script>