Operators are used to set up the calculation method for a formula. You can type the following operators directly into the formula text box.

Arithmetic operators   Relational operators
+ add GT or > greater than
- subtract LT or < less than
* multiply EQ or = equal to
/ divide GE or >= greater than or equal
    LE or <= less than or equal
    NE or <> not equal
Logical operators  
AND and
OR or
NOT not