Question

How to calculate the sum of first N natural numbers in JavaScript

Answer 1

// In mathematics, the natural numbers are 1, 2, 3, 4, and so on
// 1 + 2 + 3 + 4 + ... + N

let n = 10, sum = 0;
 
while (n > 0) {
    sum += n;
    n--;
}
         
console.log("The sum is: " + sum);



/*
run:  

The sum is: 55 

*/

 

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Answer 2

// In mathematics, the natural numbers are 1, 2, 3, 4, and so on
// 1 + 2 + 3 + 4 + ... + N

let n = 12, sum = 0;
 
sum = n / 2 * (n + 1);
         
console.log("The sum is: " + sum);



/*
run:  

The sum is: 78

*/

 

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