Cody

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

Solution 1603893

Submitted on 8 Aug 2018 by Miklós Csécsi
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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))

idx = 1×100 logical array Columns 1 through 44 1 0 1 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 Columns 45 through 88 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 Columns 89 through 100 0 0 1 0 0 0 0 0 0 0 0 0 y = 1×100 logical array Columns 1 through 44 1 0 1 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 Columns 45 through 88 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 Columns 89 through 100 0 0 1 0 0 0 0 0 0 0 0 0

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

idx = logical 1 y = logical 1

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

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