Question

How to create an array containing a range of numbers in TypeScript

Answer 1

function createRangeArray(start: number, end: number): number[] {
    let arr: number[] = [];
    for (let i = start; i <= end; i++) {
        arr.push(i);
    }

    return arr;
}

let start: number = 3;
let end: number = 11;
let rangeArray: number[] = createRangeArray(start, end);

console.log(rangeArray);
 
 
 
/*
run:
 
[3, 4, 5, 6, 7, 8, 9, 10, 11] 
 
*/

 

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Answer 2

function createRangeArray(start: number, end: number): number[] {
    return Array.from({ length: end - start + 1 }, (_, i) => start + i);
}

let start: number = 3;
let end: number = 11;
let rangeArray: number[] = createRangeArray(start, end);

console.log(rangeArray);
 
 
 
/*
run:
 
[3, 4, 5, 6, 7, 8, 9, 10, 11] 
 
*/

 

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