From QB64.org wiki
The > condition symbol denotes that a value must be greater than another value for the condition to be True.
Example usage: IF x > 320 THEN PRINT "Right of screen"
- Statements will evaluate as True or -1 when the first value is greater or False or 0 when equal or the first value is less.
- More than one > symbol in a numerical statement will create a Boolean evaluation of the ensuing numerical value.