Sum of First N Numbers
Sum of First N Numbers
EasyLoops34% accepted
Given a positive integer N, compute the sum of all integers from 1 to N inclusive. This classic problem introduces loops — one of the most important programming concepts. You can solve it with a loop or using the formula N*(N+1)/2.
Approach
Given N, print the sum 1 + 2 + 3 + ... + N.
Input
1
Output
1
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