Crystal Reports for Rational Application Developer Designer Guide
Comparison operators (Crystal syntax)
The comparison operators are equal (=), not equal (<>), less than (<), less than or equal (<=), greater than (>) and greater than or equal (>=).
Comparison operators are usually used to compare operands for a condition in a control structure such as an If expression. Comparison operators as a group all have lower precedence than the arithmetic operators. Thus, expressions like 2 + 3 < 2 * 9 are the same as (2 + 3) < (2*9).