low_str_isdigit

l_int low_str_isdigit ( 
		l_int 		chr 
); 
Returns true if @chr is a particular representation of a decimal-digit character.
Return Value
low_str_isdigit returns a non-zero value if @chr is a decimal digit (0 – 9). Returns 0 if @chr does not satisfy the test condition.
Parameter
chr
Integer to test