Yes. Javascript provides the built-in object Math
. It has several useful methods to work on numbers. Let's go through, which we really use.
Round to integer
- round() - ➡️ Rounds to its nearest integer.
- ceil() - ⬆️ Rounds up to its nearest integer.
- floor() - ⬇️ Rounds down to its nearest integer.
const num = 10.5;
console.log(Math.round(num)); // 11
console.log(Math.ceil(num)); // 11
console.log(Math.floor(num)); // 10
const num1 = 10.4;
console.log(Math.round(num1)); // 10
console.log(Math.ceil(num1)); // 11
console.log(Math.floor(num1)); // 10
Remember like this:
round - 10.0 - 10.4 -> 10 and 10.5 -> 11.0 -> 11
ceil (up) - 10.1 - 10.9. -> 11
floor (down) - 10.1 - 10.9 -> 10
The same applies to negative numbers.
Return Integer part
trunc() - returns integer part as it is.
const num = 10.547;
console.log(Math.trunc(num));
> 10
Return absolute number
abs() - returns positive number.
const num = 10.547;
const num1 = -10.547;
console.log(Math.abs(num)); // 10.547
console.log(Math.abs(num1)); // 10.547
power & sqrt
Hope no explanation is needed.
const num = 9;
console.log(Math.pow(num, 2)); // 81
console.log(Math.sqrt(num)); // 3
max & min
Returns Max number and min number in the given list.
console.log(Math.max(3,4,5,1,2)); // 5
console.log(Math.min(3,4,5,1,2)); // 1
random number
random() - method used to return random number between 0 - 1.
console.log(Math.random()); // 0.34609498534013383
Few more methods of Math
object that we rarely use them.
Those are:
Math.sign()
- returns -1 (negative), 0 (null), 1 (positive) based on the number provided.
Math.sin() & Math.cos()
- trignometric operations - sin 90 - 1.
Math.log(x) & Math.log2() & Math.log10()
- returns logarthmic conversion.
Thanks 😊
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