JavaScript: Generate a random integer

Last update on August 19 2022 21:51:54 (UTC/GMT +8 hours)

JavaScript Math: Exercise-4 with Solution

Write a JavaScript function to generate a random integer.

Test Data :
console.log(rand(20,1));
console.log(rand(1,10));
console.log(rand(6));
console.log(rand());
15
5
1
0

Pictorial Presentation:

$JavaScript: Math - Generate a random integer$

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Javascript random function</title>
</head>
<body>

</body>
</html>

JavaScript Code:

rand = function(min, max) {
  if (min==null && max==null)
    return 0;    
  
  if (max == null) {
      max = min;
      min = 0;
    }
    return min + Math.floor(Math.random() * (max - min + 1));
  };
 console.log(rand(20,1));
 console.log(rand(1,10));
 console.log(rand(6));
 console.log(rand());

Sample Output:

Flowchart:

$Flowchart: JavaScript Math- Generate a random integer$

Live Demo:

See the Pen javascript-math-exercise-4 by w3resource (@w3resource) on CodePen.

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