Test an input to see whether it is an integer or a floating point number. If it is an integer return 1 for 'true'. Otherwise return 0 for 'false'.
More test cases are needed to prevent answers like this.
Back to basics 23 - Triangular matrix
Back to basics 26 - Keywords
Return unique values without sorting
Divisors of an integer
Is this triangle right-angled?
Sum of the Matrix Elements
Are you in XY plane?
Convert a vector into numbers
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