def printOp
    swap print print nl
enddef

8 var a 3 var b
"a = " a printOp
"b = " b printOp

"a + b = " a b + printOp
"a - b = " a b - printOp
"a * b = " a b * printOp
"int(a / b) = " a b / int printOp
"a mod b = " a b mod printOp
"a ^ b = " a b power printOp