math javascript

1abs(x)	Returns the absolute value of x
2acos(x)	Returns the arccosine of x, in radians
3acosh(x)	Returns the hyperbolic arccosine of x
4asin(x)	Returns the arcsine of x, in radians
5asinh(x)	Returns the hyperbolic arcsine of x
6atan(x)	Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians
7atan2(y, x)	Returns the arctangent of the quotient of its arguments
8atanh(x)	Returns the hyperbolic arctangent of x
9cbrt(x)	Returns the cubic root of x
10ceil(x)	Returns x, rounded upwards to the nearest integer
11cos(x)	Returns the cosine of x (x is in radians)
12cosh(x)	Returns the hyperbolic cosine of x
13exp(x)	Returns the value of Ex
14floor(x)	Returns x, rounded downwards to the nearest integer
15log(x)	Returns the natural logarithm (base E) of x
16max(x, y, z, ..., n)	Returns the number with the highest value
17min(x, y, z, ..., n)	Returns the number with the lowest value
18pow(x, y)	Returns the value of x to the power of y
19random()	Returns a random number between 0 and 1
20round(x)	Rounds x to the nearest integer
21sin(x)	Returns the sine of x (x is in radians)
22sinh(x)	Returns the hyperbolic sine of x
23sqrt(x)	Returns the square root of x
24tan(x)	Returns the tangent of an angle
25tanh(x)	Returns the hyperbolic tangent of a number
26trunc(x)	Returns the integer part of a number (x)

1
2Math.ceil(4.9);     // returns 5
3
4Math.ceil(4.7);     // returns 5
5
6Math.ceil(4.4);     // returns 5
7
8Math.ceil(4.2);     // returns 5
9
10Math.ceil(-4.2);     // returns -4
11
12 

1
2Math.round(4.9);    // returns 5
3
4Math.round(4.7);    // returns 5
5
6Math.round(4.4);    // returns 4
7
8Math.round(4.2);    // returns 4
9
10Math.round(-4.2);    // returns -4
11
12 

1
2Math.trunc(4.9);    // returns 4
3
4Math.trunc(4.7);    // returns 4
5
6Math.trunc(4.4);    // returns 4
7
8Math.trunc(4.2);    // returns 4
9
10Math.trunc(-4.2);    // returns -4
11
12 

1
2Math.floor(4.9);    // returns 4
3
4Math.floor(4.7);    // returns 4
5
6Math.floor(4.4);    // returns 4
7
8Math.floor(4.2);    // returns 4
9
10Math.floor(-4.2);    // returns -5
11
12 

1
2Math.sign(-4);    // returns -1
3
4Math.sign(0);    // returns 0
5
6Math.sign(4);    // returns 1
7
8