Math

Math unctionality in js

• Math
  • Min / Max
    • Min
    • Max
  • Truncate
  • Floor / Ceiling
    • Floor
    • Ceiling
  • Round
  • Random

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Min / Max

Min

Math.min([array of numbers]) returns the smallest number

let numArray = [9, 55, 44, 2, 900, 1];
console.log('Min: ' + Math.min(...numArray));; // prints 1 - Note that the ... syntax means this is the only argument for a required range
console.log('Min: ' + Math.min(4,66,777,2,-6));; // prints -6

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Max

Math.max([array of numbers]) returns the highest number

console.log('Max: ' + Math.max(...numArray));; // prints 900 
console.log('Max: ' + Math.max(4,66,777,2,-6));; // prints 777

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Truncate

Math.trunc(number) removes any fractions and only returns an integer. No rounding

let mt = 5.9;
console.log('Trunc: ' + Math.trunc(mt));  // returns 5

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Floor / Ceiling

Floor

Math.floor(number) rounds down and returns an integer

let mf = 5.9;
console.log('Floor: ' + Math.floor(mf));  // returns 5

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Ceiling

Math.ceil(number) rounds up and returns an integer

let mc = 5.1;
console.log('Ceil: ' + Math.ceil(mc));  // returns 6

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Round

Math.round(number) rounds to the nearest integer

let mr = 4.99999;
console.log('Round: ' + Math.round(mr));  // returns 5

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Random

Math.random() Returns a fraction between 0 and 1

let rnd = 100; // set the max random number
// return a number between 1 and 100
console.log('Random: ' + (Math.floor(Math.random() * rnd) + 1)); 

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