PPT Slide

EQUALITY and INEQUALITY

Prolog provides built-in predicates for testing equality and inequality.

But you write them in INFIX!

a = a .

yes

a = b .

no

1 = 2 .

no

1 < 2 .

yes

1 = < 2 .

yes

1 \ = = 2 .

yes

NOTE!

between( X , A , B ) :- X > = A , X = < B .

P.21

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