JavaScript: Generate a random integer
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:
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:
4 1 2 0
Flowchart:

Live Demo:
See the Pen javascript-math-exercise-4 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript function to convert a decimal number to binary, hexadecimal or octal number.
Next: Write a JavaScript function to format a number up to specified decimal places.
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