RosettaCodeData/Task/Boolean-values/PowerBASIC/boolean-values.powerbasic

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DIM x AS LONG
x = ISTRUE(1 = 1) ' returns -1
x = ISTRUE(1 = 0) ' returns 0
x = ISFALSE(1 = 1) ' returns 0
x = ISFALSE(1 = 0) ' returns -1