1. Computers & Programming Languages

2. Relational & Logical Operators
Lesson2- Objectives
Examine relational and logical operators
Explore how to form and evaluate logical Boolean expressions

3. Operators that allows you to make comparisons in a program.
Relational Operators
Operators that allows you to make comparisons in a program.

4. Tip to Remember ..
What is the difference between the two following operators ( = = and = )?
= = determines two equations are equal
= assigns a value of an expression to variable

5. What is the output of the following expressions if M = 6, D= 3, L=5
Task 1
What is the output of the following expressions if
M = 6, D= 3, L=5
Expression
Output
System.out.println (M >= D);
System.out.println (L > D);
System.out.println (D > M);
System.out.println (5 == ‘5’);
System.out.println (8 <=5);
System.out.println (M != L);
true
True
False
Work in pairs and answer activity P-215

6. Logical operators
True
True
! True
True
False
True
False

7. Evaluate each of the following expressions:
Book Activity P-217
Evaluate each of the following expressions:
Expression
Output
(18>=16) && (‘D’ <‘E’)
(17 >=15) && (‘J’ <‘D’)
(14>=5) | | (‘A’ >’B’)
!(14>=5) | | (‘A’ > ‘B’)
true
False
True

8. Order of precedence

9. Book Activity P219
true
False
True