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18 changes: 18 additions & 0 deletions Project Euler/Problem1.js
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/* Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
Find the sum of all the multiples of 3 or 5 below the provided parameter value number.
*/

function multiplesThreeAndFive (num) {
let total = 0
// total for calculating the sum
for (let i = 0; i <= num; i++) {
if (i % 3 === 0 || i % 5 === 0) {
total += i
}
}
return total
}

var num = console.log('Enter a number: ')
console.log(multiplesThreeAndFive(num)) // multiples3_5 function to calculate the sum of multiples of 3 and 5 within num