Cody

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

Solution 232912

Submitted on 19 Apr 2013 by andrea84
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### Test Suite

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))

``` t = Columns 1 through 16 1 0 1 0 0 1 0 0 0 1 0 0 0 0 1 0 Columns 17 through 32 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 Columns 33 through 48 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 Columns 49 through 64 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 Columns 65 through 80 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 Columns 81 through 96 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 Columns 97 through 100 0 0 0 0 ```

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

``` t = 1 ```

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

``` t = 0 1 ```