The Maple command evalb evaluates a boolean expression (see Section 5.1). Since Xcas evaluates booleans automatically, it includes a evalb command only here for compatibility and is equivalent to eval (see Section 9.1.1).
| evalb(sqrt(2)>1.41) | 
or:
| sqrt(2)>1.41 | 
| 
 | 
| evalb(sqrt(2)>1.42) | 
or:
| sqrt(2)>1.42 | 
| 
 |