JavaScript – Math
The Math object allows you to perform mathematical tasks.
All properties/methods of Math can be called by using Math as an object, without creating it.
The code:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
var x=9;
var y=Math.sqrt(x);
document.getElementById("demo").innerHTML=y;
</script>
</body>
</html>
Notice:
x=9; y=Math.sqrt(x);
Complete list:
var y=Math.abs(x) // Returns the absolute value of x var y=Math.acos(x) // Returns the arccosine of x, in radians var y=Math.asin(x) // Returns the arcsine of x, in radians var y=Math.atan(x) // Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians var y=Math.atan2(y,x) // Returns the arctangent of the quotient of its arguments var y=Math.ceil(x) // Returns x, rounded upwards to the nearest integer var y=Math.cos(x) // Returns the cosine of x (x is in radians) var y=Math.exp(x) // Returns the value of Ex var y=Math.floor(x) // Returns x, rounded downwards to the nearest integer var y=Math.log(x) // Returns the natural logarithm (base E) of x var y=Math.max(x,y,z,...,n) // Returns the number with the highest value var y=Math.min(x,y,z,...,n) // Returns the number with the lowest value var y=Math.pow(x,y) // Returns the value of x to the power of y var y=Math.random() // Returns a random number between 0 and 1 var y=Math.round(x) // Rounds x to the nearest integer var y=Math.sin(x) // Returns the sine of x (x is in radians) var y=Math.sqrt(x) // Returns the square root of x var y=Math.tan(x) // Returns the tangent of an angle
