Hi everybody, I'm Aya Bouchiha, and this is your complete guide to Math object in Javascript!
Math Object
Firstly, we need to know that Math is a built-in object, It works with Number type and not with BigInt. In addition, It is not a constructor. All its properties and its methods are static.
Math.floor()
Math.floor(number) : rounds a number down and returns an integer value.
/* rounds a number down */
console.log(Math.floor(2.4)) // 2
console.log(Math.floor(1.999999)) // 1
console.log(Math.floor(10.5)) // 10
Math.ceil()
Math.ceil(number) : rounds a number up to the next largest integer.
/* rounds a number up to the next largest integer */
console.log(Math.ceil(0.000000000000000001)) // 1
console.log(Math.ceil(0) )// 0
console.log(Math.ceil(10.5)) // 11
Math.random()
Math.random() : returns a random number where 0 <= Math.random() < 1
/* get a random number n where 0 <= n < 1 */
console.log(Math.random()) // 0.3594237846698176
// Returns a random integer from 0 to 50:
console.log(Math.floor(Math.random() * 50)) // 43
Math.round()
Math.round(number) : rounds to the nearest integer
/* rounds to the nearest integer */
console.log(Math.round(0.2)) // 0
console.log(Math.round(10.5)) // 11
console.log(Math.round(1.9) )// 2
Math.trunc()
Math.trunc(number) : returns the integer part of a number by removing any fractional digits.
/* get the integer part of a number */
console.log(Math.trunc(1.000000001)) // 1
console.log(Math.trunc(10.5)) // 10
console.log(Math.trunc(4.999999)) // 4
Math.sign()
Math.sign(number) :indicate the sign of a numeber. If the num is:
- negative : returns -1
- 0 : returns 0
- positive : returns 1
/* get the sign of a number */
console.log(Math.sign(-4.5)) // -1
console.log(Math.sign(0)) // 0
console.log(Math.sign(10)) // 1
Math.pow()
Math.pow(base, exponent) : returns baseexponent.
/* get the value of a num1 to the power of a num2 */
console.log(Math.pow(2,3)) // 8
console.log(Math.pow(1,10)) // 1
console.log(Math.pow(10,3)) // 1000
Math.sqrt()
Math.sqrt(num) : returns the square root of a number.
/* get the square root of a number. */
console.log(Math.sqrt(16)) // 4
console.log(Math.sqrt(100)) // 10
console.log(Math.sqrt(25)) // 5
Math.cbrt()
Math.cbrt(num) : returns the cubic root of a number.
/* get the cubic root of a number. */
console.log(Math.cbrt(8)) // 2
console.log(Math.cbrt(27)) // 3
console.log(Math.cbrt(64)) // 4
Math.log2()
Math.log2(num) : returns the base 2 logarithm of a number,
/* get the base 2 logarithm of a number */
console.log(Math.log2(2)) // 1
console.log(Math.log2(8)) // 3
console.log(Math.log2(16)) // 4
Math.min()
Math.min(n1, n2, n3, ..) : returns The smallest number of the given numbers. If one of the giving arguments is not a number It returns NaN, and Infinity if no arguments are passed.
/* get the smallest of the given numbers. */
console.log(Math.min(2, 4, 6, 8)) // 2
console.log(Math.min(...[20, 10, 100, 70])) // 10
console.log(Math.min(7, "Aya", "Bouchiha", 3)) // NaN
console.log(Math.min()) // Infinity
Math.max()
Math.max(n1, n2, n3, ..) : returns The biggest number of the given numbers. If one of the giving arguments is not a number it returns NaN, and -Infinity if no arguments are passed.
/* get the biggest num of the given numbers. */
console.log(Math.max(2, 4, 6, 8)) // 8
console.log(Math.max(...[20, 10, 100, 70])) // 100
console.log(Math.max(7, "Aya", "Bouchiha", 3)) // NaN
console.log(Math.max()) // -Infinity
Math.abs()
Math.abs(num) : returns the absolute value of the giving number. This method can accept also numeric strings like '-1' .
- It returns NaN if the giving argument is not a number or is not a numeric-string, or It is undefined or empty .
- It returns 0 if the argument is
null,[],''or""
/* get the absolute value of the given number */
console.log(Math.abs(-2)) // 2
console.log(Math.abs(0)) // 0
console.log(Math.abs(4.5)) // 4.5
console.log(Math.abs('')) // 0
console.log(Math.abs(null)) // 0
console.log(Math.abs([])) // 0
console.log(Math.abs('Aya Bouchiha')) // NaN
console.log(Math.abs([1, 2, 3, 4])) // NaN
console.log(Math.abs({})) // NaN
console.log(Math.abs()) // NaN
console.log(Math.abs(undefined)) // NaN
Math.tan()
Math.tan(angleInRadians) : returns the tangent of a giving angle(radians).
/* get the tangent an angle(radians) */
console.log(Math.tan(1)) // 1.5574077246549023
console.log(Math.tan(2)) // -2.185039863261519
console.log(Math.tan()) // NaN
console.log(Math.tan('')) // 0
Math.sin()
Math.sin(angleInRadians) : returns the sine of a giving angle
(radians), in addition, it is between -1 & 1.
/* get the sine of an angle(radians) */
console.log(Math.sin(2)) // 0.9092974268256817
console.log(Math.sin(1)) // 0.8414709848078965
console.log(Math.sin()) // NaN
console.log(Math.sin('')) // 0
Math.cos()
Math.cos(angleInRadians) : returns the cosine of a giving angle
(radians), in addition, it is between -1 & 1.
/* get the cosine of an angle(radians) */
console.log(Math.cos(2)) // -0.4161468365471424
console.log(Math.cos(1)) // 0.5403023058681398
console.log(Math.cos()) // NaN
console.log(Math.cos('')) // 1
Math.exp()
Math.exp(number) : returns ex
Math.Pi
Math.Pi : is a static property of Math that returns the value of PI (approximately 3.14)
/* PI */
const Pi = Math.PI
const CalculateAreaOfACircle = radius => Math.round(Pi* (radius ** 2));
console.log(Pi) // 3.141592653589793
console.log(CalculateAreaOfACircle(4)) // 50
Math.E
Math.E : is a static property of Math that returns the value of Euler's number (approximately 2.718)
/* Euler's numbe */
const e = Math.E
console.log(e) // 2.718281828459045
Math.LN2
Math.E : is a static property of Math that returns the natural logarithm of 2 (approximately 0.693)
/* natural logarithm of 2 */
console.log(Math.LN2) // 0.6931471805599453
Final Code
Have A Nice Day!
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