Underscore.js _.random() Function
Underscore.js is a library in javascript that makes operations on arrays, string, objects much easier and handy. The _.random() function is used to return a random integer which is in the range provided to the function.
Note: It is very necessary to link the underscore CDN before going and using underscore functions in the browser. When linking the underscore.js CDN The "_" is attached to the browser as a global variable.
Syntax:
_.random(min, max);
Parameters: It takes the following parameters.
- min value: It is the minimum random value to be returned by the function.
- max value: It is the maximum random value that can be returned by the function.
Return Value: It returns a random integer between the min and max. If only one value is passed then it will return random value between 0 and passed value.
Example 1:
<!DOCTYPE html>
<html>
<head>
<script src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script>
let min = 5;
let max = 10;
// Printing 5 random values
// in range 5 and 10
for (let i = 0; i < 5; i++) {
console.log(_.random(min, max));
}
</script>
</body>
</html>
Output:
Example 2: If no parameter is given to the random function.
<!DOCTYPE html>
<html>
<head>
<script src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script>
// Without passing any
// value to function
console.log(_.random())
</script>
</body>
</html>
Output:
Example 3: When only one parameter is given then random value is in range 0 to n, where n is the parameter given.
<!DOCTYPE html>
<html>
<head>
<script src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script>
console.log(_.random(10))
console.log(_.random(5))
console.log(_.random(8))
</script>
</body>
</html>
Output:
