JavaScript - Sum of All Numbers in a Range



We'll pass you an array of two numbers. Return the sum of those two numbers plus the sum of all the numbers between them. The lowest number will not always come first.


For example, sumAll([4, 1]) should return 10 because sum of all the numbers between 1 and 4(both inclusive) is 10.


Solution 1 Basic approach using reduce function


function sumAll(arr) {
    let newArr = []
    for (let i = Math.min(...arr); i <= Math.max(...arr); i++) {
        newArr.push(i)
    }
    const sumOfArr = newArr.reduce((sum, num) => sum + num, 0)
    return sumOfArr;
}
console.log(sumAll([4, 1]));

Output:


10

Solution 2 without reduce function


function sumAll(arr) {
    var sum = 0;
    for (var i = Math.min(...arr); i <= Math.max(...arr); i++) {
        sum += i;
    }
    return sum;
}
console.log(sumAll([4, 1]));

Output:


10

Solution not working or have any suggestions? Please send an email to [email protected]



Join Our Facebook Group


Share this example


Download Android App

download android app

Popular javascript Examples









codesadda.com

Codesadda.com is your home of programming solutions, tutorials, video tutorials and much more. Sign Up for our weekly newsletter to get update about new content.

Like us on Facebook | Connect with us on LinkedIn | Subscribe our Channel on Youtube