Remaider check creates an infinte loop

JavaScript
1

Can someone explain to me why adding the remaider check in the if statement creates an infinite loop? The code works fine without the remainder check and I can’t unedrstand why it is happening since the if statement has nothing to do with incrementing i.

The code:


function sumFibs(num) {
let fibArr = [1, 1];
let i = 0;

while (i <= num){
  i = fibArr[fibArr.length - 1] + fibArr[fibArr.length -2];
  if (i <= num && i % 2 == 1) {
    fibArr.push(i);
  }
}
console.log(fibArr)
return fibArr.reduce(function(a, b) {
  return a + b;
  });
}
sumFibs(4);

My browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Safari/537.36.

Challenge: Sum All Odd Fibonacci Numbers

Link to the challenge:

2

Notice that i is changed based on the values present in the fibArr. At the same time fibArr is having new value pushed only if i is odd. Do you see where this is going?

1 Like
3

Oh shiiiiii, thanks man, this has stumped me for a good couple hours

4

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