# prolog arithmetic examples

In Prolog, is the similar to the assignment operator = in other languages. X is 1+2 means assign the result 1+2 to the variable X. The following are some arithmetic operations performed in the prolog console window.

?- X is 1+2. X = 3 ?- X is 6-2. X = 4 ?- X is 2*3. X = 6 ?- X is 6/2. X = 3 ?- X is mod(9,2). X = 1

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