is___

A small set of simple is___ utility functions convenient to have on the path.

• isodd - true for odd elements of an array.
• iseven - true for even elements of an array.
• isint - true for integer elements of an array (not to be confused with isinteger).
• isnatural - true for natural elements of an array.
• iswhole - true for whole number elements of an array.
• ispositive - true for positive elements of an array.
• isnegative - true for negative elements of an array.
• istext - true for character or string arrays.