Error in using the output of one function in another function (beginner)

[zivoni]

Hmm, both of these statements are "assignment" statements - the right side of statement is evaluated and assigned to the left side.

1. you can put returned value of a function call into a variable
   
2. but you cant put some variable into function call
   

Is important to differentiate between  = - assignment (not equality) operator and  == - comparison/equality