6 + 7 = 13
6 - 7 = -1
6 x 7 = 42
6 / 7 = 0.85714285714286
6 % 7 = 6
6
preincrement of $variableA = 7
postincrement of $variable A = 7
8
8
predecrement of $variableA = 7
postdecrement of $variable A = 7
6