The name of the session shown here is: ch1_5.mw . Open it in the directory: /home/ceng303/maple/sessions

Section 1.5 Maple Session: defining expressions

>	restart;   This removes any defined functions from previous sessions

>	f1:=sin(x); Note the semicolon

>	f2:=x^2-1: Note the colon

>	f2; We can still list f2

>	x:=3; Now we assign x a value

>	f1; Notice f1 is still defined but x has  been replaced by 3

        

>	f2; Again x is replaced by 3 but the  expression has been evaluated in f2

>	evalf(f1); Used to evaluate  and obtain a numeric value for sin(3)

>	x:=2.1; Define x as a real number and not an integer

>	f2;  f2 evaluates to become a real number: 2.1^2-1

>	f1;   sin(2.1) evaluates as well.

>