NAME
IsNonNegative — Tell whether value is non-negative or not.
SYNOPSIS
IsNonnegative Value
DESCRIPTION
Return Value
1 The value is non-negative.
0 The value is negative.
Arguments
ValueValue to check.

For information regarding exceptions / errors, see here.
EXAMPLES 
% IsNonNegative 0
1
% IsNonNegative -1
0
SEE ALSO
IsNegative, IsNonPositive, IsPositive
KEYWORDS
check, math, validation, verification