Barbie caught a lot of flack back in the ’90s for declaring, “Math class is tough!” Today we find ourselves in the disorienting position of defending her. We recently got a note f… ...

3. Principal of the present arithmetic operation system The principal of the present arithmetic operation system resides in that ¡°digit number is changed simply by changing a digit-number parameter ...

When used to perform arithmetic operations, the plus and minus signs are infix operators. SAS also provides several other operators that are used only with certain SAS statements. The WHERE statement ...