Problem 189. Sum all integers from 1 to 2^n

Solution 917043

Submitted on 30 Jun 2016 by John D'Errico

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John D'Errico on 30 Jun 2016

Of course, this solution use the formula from Carl Friedrich Gauss for the sum of the integers from 0 to n.

Test	Status	Code Input and Output
1	Pass	x = 7; y_correct = 8256; assert(isequal(sum_int(x),y_correct))
2	Pass	x = 10; y_correct = 524800; assert(isequal(sum_int(x),y_correct))

Test

Status

Code Input and Output

Pass

x = 7; y_correct = 8256; assert(isequal(sum_int(x),y_correct))

Pass

x = 10; y_correct = 524800; assert(isequal(sum_int(x),y_correct))