In this article we will learn various math function in JavaScript
Math functions in JavaScript- Part 1
In this article we will learn various math functions in
JavaScript. Math functions are needed to perform mathematical operation in
application. Let’s learn one by one of them.
round() function to get absolute value
round() function discard the fraction part from a number. In
this example we are using round() function on a real number. Have a look on
below example.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
var number = 10.234567;
console.log("Abstract value is:" + Math.round(number));
</script>
</body>
</html>
Ceil() function
Ceil() function is used to get higher rounded value of any
real number. In this example we are applying ceil() function to a real variable
called “number”.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
var number = 10.234567;
console.log("Ceil value is :- " + Math.ceil (number));
</script>
</body>
</html>
The ceil() function is returning the next rounded value
which is 11 in this article.
floor() function
It is nothing but opposite of ceil() function. The floor
function returns the immediate lower round figure value. Try to understand
below example.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
var number = 10.234567;
console.log("Floor value is :- " + Math.floor (number));
</script>
</body>
</html>
max function
max() function can return the maximum value from a set of
value. In this example we are passing three values as argument of max()
function.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
var a = 100;
var b = 200;
var c = 300;
console.log("Maximum value is :- " + Math.max(a,b,c));
</script>
</body>
</html>
log function
log() function will return the logarithmic value of a number. In this example we are
supplying 10 as argument of log function.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
console.log("Log of 10 is :- " + Math.log(10));
</script>
</body>
</html>
Here is log value of 10.
PI property of math object
In this example we will learn PI property of Math object. We
know that PI is nothing but a constant in mathematics and we are printing PI
value of math object.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
console.log("Value of PI is :- " + Math.PI);
</script>
</body>
</html>
Sqrt() function
Sqrt() function returns
square root value of given number. We are passing 3 as a argument of sqrt()
function.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
console.log("Square root of 3 is :- " + Math.sqrt(3));
</script>
</body>
</html>
Conclusion:-
In this article we have learned few important math functions
of JavaScript.