formula for sum of n numbers
Sum of the First n Natural Numbers. We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural numberformula for sum of n numbers
Sum of the First n Natural Numbers. We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural numberSum of all the multiples of 3 or 5
const findSum = n => {
let countArr = []
for(let i = 0; i <= n; i++) if(i % 3 === 0 || i % 5 === 0) countArr.push(i)
return countArr.reduce((acc , curr) => acc + curr)
}
console.log(findSum(5))Copyright © 2021 Codeinu
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