Returns

nil

Description

The special value, nil, is a zero-length list. It is the only logically false value in Gamma. All other Gamma values are considered to be logically true. A common mistake for first-time Gamma programmers is to treat the number zero as logically false.

Example

Gamma> x = 5;
5
Gamma> x > 10;
nil
Gamma> int_p(x);
t
Gamma> real_p(x);
nil
Gamma> !3;
nil
Gamma> !t;
nil
Gamma> 
		

See Also

, t