6.1.2  Tests: == != > >= < =<

The usual comparison operators between numbers are examples of tests. In Xcas, they are the infixed operators:

==

 
a==b tests the equality between a and b and returns 1 if a is equal to b and 0 otherwise.
Look out !
Note that a=b is not a boolean!!!! This form is used to state that the expression is an equality, perhaps with the intent to solve it. To test for equality, you need to use a==b, which is a boolean.

!=

 
a!=b returns 1 if a and b are different and 0 otherwise.

>=

 
a>=b returns 1 if a is greater than or equal to b and 0 otherwise.

>

 
a>b returns 1 if a is strictly greater than b and 0 otherwise.

<=

 
a<=b returns 1 if a is less than or equal to b and 0 otherwise.

<

 
a<b returns 1 if a is strictly less than b and 0 otherwise.