JavaScript: Get an array of given n random integers in the specified range

JavaScript fundamental (ES6 Syntax): Exercise-35 with Solution

Array of n Random Integers in Range

Write a JavaScript program to get an array of given n random integers in the specified range.

• Use Array.from() to create an empty array of the specific length.
• Use Math.random() to generate random numbers and map them to the desired range, using Math.floor() to make them integers.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
// Define a function named random_intArray_In_Range that generates an array of random integers within a specified range.
const random_intArray_In_Range = (min, max, n = 1) =>
  Array.from({ length: n }, () => Math.floor(Math.random() * (max - min + 1)) + min);

// Test the function with different range values and output the results.
console.log(random_intArray_In_Range(1, 20, 10));  // Output: Array of 10 random integers between 1 and 20
console.log(random_intArray_In_Range(-10, 10, 5)); // Output: Array of 5 random integers between -10 and 10

Output:

[10,5,17,4,19,5,4,6,9,2]
[7,-6,2,-9,-2]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-35-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that generates an array of n random integers within a specified range.
• Write a JavaScript function that creates an array by repeatedly calling a random integer generator for a given count.
• Write a JavaScript program that validates n and the range values before populating an array with random integers.

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