Sum Primes
VonRickroll
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The goal today is to write a function that returns the sum of all prime numbers up to a limit. We will do this in two steps: first we're going to write an isPrime
function that checks wether or not a number is prime, and then the actual sumPrimes
function.
Check if a number is prime
Write an isPrime
function that takes a number as parameter and returns true if this number is prime, false if it isn't.
Reminder: A prime number:
- Can only be divided by
1
and itself - Is greater than
1
Sum all primes
Write a sumPrimes
function to sum all prime numbers up to the parameter limit
included. Copy you isPrime
function from the last assignment to make use of it here.
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