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Can I pass different parameter instead of (n1,n2,n3)?

Write a function called sumArray which accepts a single argument: an array of numbers. It should return the sum of all the numbers in the array.

Condition:

You will need a variable to keep track of total. It should start out as zero.
Loop over the array for each element, add it to total variable.

function sumArray(n1, n2, n3) {
  let total = n1 + n2 + n3;
  return total;
}

sumArray([3,45,66]);

7 months ago · Juan Pablo Isaza

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Accepted Answer · 2022-07-04T09:02:41.778Z

Just loop from array and get the output

function sumArray(arr){
  let total = 0;
  arr.forEach((i) => total+=i);
  return total;
}
console.log(sumArray([3,45,66]));

Or you can try with reduce as explained by Cristian

function sumArray(arr){
  const reducer = (previousValue, currentValue) => previousValue + currentValue;
  let total = arr.reduce(reducer)
  return total;
}
console.log(sumArray([3,45,66]));