Programming Basics

Constructs Expression Exercise

These exercises are designed to evaluate your knowledge, comprehension and application of the programming constructs of expressions. A couple of the problems evaluate your analysis and synthesis of the programming basics discussed so far. It is expected that you should be able to correctly answer all or nearly all of the questions and problems presented. You should do these exercises by yourself. This exercise represents the most foundational and elementary information to be mastered by anyone involved with computer programming.

1. Evaluate the following expressions.

Expression

Value of Variable Var

Var := 10 % 3

  

Var := 0110 | 1010

  

Var := 27 < -34.0

  

Var := 3 – 5 * 6

  

Var := True and False

  

Var := 12 = (2 * 6)

  

Var := 2 + 3

  

Var := !True

  

Var := 15/3 = 2.5*2

  

Var := 21/4 (integer)

  

Var := 10110011<<5

  

Var := 1001 & 0101

  

Var := 21.0/4.0

  

Var := ~11100010

  

Var := False or True

  

Var := 15/3 != 2.5*2

  

Var := 1010 ^ 0110

  

Var := 345 > -43256

  

Var := False || False

  

Var := (12 <= 15) and (-419 >= -937)

  

Var := 10110011>>3

  

Var := (3 – 5) * 6 / -2

  

Var := (True && True) || (!True)

  

 

2. Why is left shift and right shift a quick multiplier and divider by 2^n?

 

3. What happens when you right shift a negative number? Is it a division by 2^n? Show what happens with this expression -50 >> 2.