js generate a random number with a range limited All In One

js generate a random number with a range limited All In One

Math.random() 取值范围：[0 ~ 1), 左闭右开

function randomRange(myMin, myMax) {
  // + min
  // * (max - min + 1))
  return Math.floor(Math.random() * (myMax - myMin + 1)) + myMin;
}

solutions

// (min, max) 左开右开
function randomRange(min, max) {
  return Math.random() * (max - min) + min;
}

// [min, max] 左闭右闭
function randomRange(min, max) {
  max = Math.ceil(max);
  min = Math.floor(min);
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

todos

???

https://www.freecodecamp.org/news/generate-random-number-within-a-range-in-javascript/

https://www.freecodecamp.org/chinese/news/generate-random-number-within-a-range-in-javascript

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refs

https://stackoverflow.com/questions/1527803/generating-random-whole-numbers-in-javascript-in-a-specific-range

https://www.sitepoint.com/generate-random-numbers-javascript/

https://www.educative.io/answers/how-to-generate-a-random-number-between-a-range-in-javascript

freecodecamp

https://www.freecodecamp.org/chinese/learn/javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-within-a-range

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