Learn javascript math object - mathematical functions with examples


In this blog post, we are going to cover the javascript inbuilt mathematical functions library with examples.

Learn javascript math object - mathematical functions with examples

javascript math object 

Math is a javascript inbuilt object, and it contains various utility mathematical functions. As every programming language provides mathematical operations as part of programming language.
It contains multiple functions and constants and properties.

Constants and properties

The following are constants declared in Math Object in javascript

  • Math.E -¬† it returns natural base algorithm¬† - Approximate value is 2.718
  • Math.LN2 - logarithmic¬† of base 2 -¬† 0.693
  • Math.LN10 -¬† logarithmic of base 10 - 2.303
  • Math.LOG2E - Log of E for base 2 - 1.443
  • Math.LOG10E -¬† Log of E for base 10 - 0.434
  • Math.PI -¬† Outputs PI value - 3.14
  • Math.SQRT1_2 -¬† Square root of¬† half of the number¬†
  • Math.SQRT2 -¬† Square root of two value

Static Inbuilt Functions

It provides various mathematical inbuilt static functions.

Math.abs() - Absolute value function

This function returns the absolute value of a given number 

The parameter is n,

if the number is greater than zero, returns the same number

if the number is zero, returns zero

if the number is less than zero, return a positive number

Math.abs(5.3) //5.3  
Math.abs(-5.3) //5.3  
Math.abs(null) //0  
Math.abs('test') //NaN  

Math.acos() - arccosine value function 

This function returns arccosine of a value. Parameter number takes a value between -1 and 1

console.log(Math.acos(0.1)) //1.4706289056333368  
console.log(Math.acos(5)) // NaN  
console.log(Math.acos(null)) // 1.5707963267948966  

Math.acosh() - hyperbolic arc-cosine value function

This method performs hyperbolic arc-cosine and returns the value

  
console.log(Math.acosh(0.1)) //NaN  
console.log(Math.acosh(5)) // 2.2924316695611777  
console.log(Math.acosh(null)) // NaN  

Math.asin(x) Math.asinh(x) functions 

  • Math.asin(x) - This method performsn arcsine of a value¬†
  • Math.asinh(x) - This method performs hyperbolic arcsine of a value
console.log(Math.asin(0.1)) //0.1001674211615598  
console.log(Math.asin(5)) // Nan  
console.log(Math.asin(null)) // 0  
  
console.log(Math.asinh(0.1)) //0.09983407889920758  
console.log(Math.asinh(5)) //2.3124383412727525  
console.log(Math.asinh(null)) // 0  

arctangent functions 

  • Math.atan(x) - Performsn mathmatical arctangent of avalue¬†
  • Math.atanh(x) - Performsn mathmatical hyperbolic arctangent of avalue Math.atan2(y, x) - hyperbolic quotient of a value
console.log(Math.atan(0.1)) //0.09966865249116204  
console.log(Math.atan(5)) //1.373400766945016  
console.log(Math.atan(null)) // 0  
  
console.log(Math.atanh(12)) //NaN  
console.log(Math.atanh(0.1)) //0.10033534773107558  
console.log(Math.atanh(null)) // 0  
  
console.log(Math.atan2(12,3)) //1.3258176636680326  
console.log(Math.atan2(10,4)) //1.1902899496825317  
console.log(Math.atan2(null,null)) // 0  

Math.cbrt() - cube root calculation 

This function performs cube root of a given number

console.log(Math.cbrt(8)) //2  
console.log(Math.cbrt(10)) //2.154434690031884  
console.log(Math.cbrt(null)) // 0  

Math.ceil() - Rounds the upper number 

This method returns the rounded the upper number

Math.ceil(0.75); //  1  
Math.ceil(0.45); //  1  
Math.ceil(2); //  2  
Math.ceil(4.3); //  4  
Math.ceil(-3.2); // -3  
Math.ceil(-3.9); // 3 

Math.floor() - Rounds lowest number

This method returns the rounded the lowest number

  
Math.floor(0.75); //  0  
Math.floor(0.45); //  0  
Math.floor(2); //  2  
Math.floor(4.3); //  4  
Math.floor(-3.2); // -3  
Math.floor(-3.9); // -4  

Math.random()- Random Number Generator 

This function generates random number between 0 and 1

console.log(Math.random()) //0.044142306688350175  
console.log(Math.random()) //0.5684720489854178  

Math.max() - Find Maximum number

This returns maximum number from zero or more numbers.

console.log(Math.max(4,51)) //51  
console.log(Math.max(1,5)) //5  
console.log(Math.max(0,null,3)) //3  

Math.min() - Find Miniumum number

console.log(Math.min(4,51)) //4  
console.log(Math.min(1,5)) //1  
console.log(Math.min(0,null,3)) //0  

Math.pow() - exponent power base

This function performs exponent power base of a number

  
console.log(Math.pow(2,3)) //8  
console.log(Math.pow(5,3)) //125  

Math.round() - Round number 

This method returns the rounded of nearest number

console.log(Math.round(3.1)) //3  
console.log(Math.round(-3.1)) //-3  
console.log(Math.round(3.9)) //4  
console.log(Math.round(-3.9)) //-4  

Math.trunc() - truncate number 

This method returns the truncate number, It omits decimal values

console.log(Math.trunc(3.1)) //3  
console.log(Math.trunc(-3.1)) //-3  
console.log(Math.trunc(3.9)) //3  
console.log(Math.trunc(-3.9)) //-3  

Math.sqrt() - Square root of a number 

 This method returns the square root of a number

  
console.log(Math.sqrt(16)) //4  
console.log(Math.sqrt(25)) //5  
console.log(Math.sqrt(100)) //10  
console.log(Math.sqrt(23)) //4.795831523312719  

Math.tan(), Math.tanh() - tangent number 

Math.tan() - tangent of a given value
Math.tanh() - hyperbolic tangent of a given argument

console.log(Math.tan(16)) //0.3006322420239034  
console.log(Math.tan(25)) //-0.13352640702153587  
console.log(Math.tanh(100)) //1  
console.log(Math.tanh(23)) //1  

Math.sign(), Math.sin() - sign number

Math.sin() - sign of a given argument
Math.sign() - Sign of a given positive,negative or zero number

  
console.log(Math.sign(16)) //1  
console.log(Math.sign(-10)) //-1  
console.log(Math.sign(0)) //0  
console.log(Math.sin(16)) //-0.2879033166650653  
console.log(Math.sin(-10)) //0.5440211108893698  
console.log(Math.sin(0)) //0  

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