Cody

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

Solution 2015574

Submitted on 12 Nov 2019
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### Test Suite

Test Status Code Input and Output
1   Fail
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))

Undefined function 'sqrt' for input arguments of type 'uint32'. Error in isTriangleNumber (line 3) y = isinteger(sqrt(1+8*x)); Error in Test1 (line 4) assert(isequal(isTriangleNumber(x),y_correct))

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

Undefined function 'sqrt' for input arguments of type 'uint32'. Error in isTriangleNumber (line 3) y = isinteger(sqrt(1+8*x)); Error in Test2 (line 3) assert(isequal(isTriangleNumber(x),y_correct))

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

Undefined function 'sqrt' for input arguments of type 'uint32'. Error in isTriangleNumber (line 3) y = isinteger(sqrt(1+8*x)); Error in Test3 (line 3) assert(isequal(isTriangleNumber(x),y_correct))