Problem 139. Determine if a Given Number is a Triangle Number

Solution 889571

Submitted on 12 May 2016 by Bruce

This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

Test	Status	Code Input and Output
1	Pass	x = 1:100; y_correct = false(1,100); y_correct([1 3 6 10 15 21 28 36 45 55 66 78 91]) = true; assert(isequal(isTriangleNumber(x),y_correct))
2	Pass	x = 1; y_correct = true; assert(isequal(isTriangleNumber(x),y_correct))
3	Pass	x = [4912734125;4912734126]; y_correct = [false;true]; assert(isequal(isTriangleNumber(x),y_correct))

Test

Status

Code Input and Output

Pass

x = 1:100; y_correct = false(1,100); y_correct([1 3 6 10 15 21 28 36 45 55 66 78 91]) = true; assert(isequal(isTriangleNumber(x),y_correct))

Pass

x = 1; y_correct = true; assert(isequal(isTriangleNumber(x),y_correct))

Pass

x = [4912734125;4912734126]; y_correct = [false;true]; assert(isequal(isTriangleNumber(x),y_correct))

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!