Computers & Programming Languages

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Presentation transcript:

Computers & Programming Languages

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

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

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

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

Logical operators True True ! True True False True False

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

Order of precedence

Book Activity P219 true False True