How to add numbers in sequence in Javascript

Question

I’m trying to figure something out, but I can’t. It has a function that takes a parameter, this parameter has a number and is basically to sum from 1 to the number of this parameter in sequence. As in 1 + 2 + 3 + 4... and return the result of the sum of these numbers.

I’m trying to solve it this way:

function somatotal(numero) {
    for (var cont = 0; cont < numero; cont++) {
        var resultado = cont + 1
        return resultado         
    } 
} 

But it’s not giving.

Answer 1

Basically your algorithm has 2 errors:

• Does not increment the result but creates a new value;

• Returns inside the repeat loop.

By correcting these mistakes we would have:

function somatotal(numero) {
  let resultado = 0;

  for (let cont = 1; cont <= numero; cont += 1) {
    resultado += cont;
  }
  
  return resultado;
}

console.log(somatotal(5));