Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
4th Edition
ISBN: 9780134787961
Author: Tony Gaddis, Godfrey Muganda
Publisher: PEARSON
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Question
Chapter 3.5, Problem 3.16CP
Program Plan Intro
Logical operator:
Logical operators are used to validate an expression and return the Boolean values as “true” or “false”. Some of the logical operators are as follows:
- Logical “and” operator
- Logical “or” operator
- The “not” operator
Logical “and” Operator:
Logical operator combines the results of one or more conditions.
- The logical “and” is used to evaluate two expressions in order to obtain a single relational result.
- It returns the Boolean value “True”, when both the operands are true, otherwise it returns “False”.
- The first operand is evaluated first and all the side effects are completed before evaluating the logical “and” expression.
- The second operand is evaluated only if the first operand is “True”.
Syntax for “and” operator:
The syntax for “and” operator is given below:
expression1 and expression2
Logical “or” Operator:
Logical operator combines the results of one or more conditions.
- The logical “or” is used to evaluate two expressions in order to obtain a single relational result.
- It returns the Boolean value “True” when one of the operands is “True”. It returns “false” only if both the operands are “false”.
- The first operand is evaluated and all the effects are completed before it continues to evaluate the logical “or” expression.
- The second operand is evaluated only if the first operands return “false”.
Syntax for “or” operator:
The syntax for “or” operator is given below:
expression1 or expression2
Logical “not” Operator:
The logical “not” operator is the unary operator that takes an operand and reverse its logical value.
Syntax for “not” operator:
!expression1
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A. Modified TRUE of FALSE. Write T if the statement is TRUE and CHANGE the underlineword if the statement is FALSE._______________2. There is only one way to determine whether a business is going to
be profitable or not.
Step 1: Consider the following values set to variables.
myAge = 32
yourAge = 18
myNumber = 81
yourNumber = 17
votingAge = 18
myName = “Katie”
yourName = “Bob”
Based on the values to the variables in Step 1, do the following conditions result in a true or false statement? (Reference: Boolean Expressions, page 119).
The condition
True or False
myAge >= yourAge
yourAge > myAge
myAge == 45
yourAge == votingAge
votingAge <= yourAge
myAge <= votingAge
myName != yourName
myNumber <= myAge
yourNumber >= myAge
yourNumber != 17
1. Evaluate the expression below. Give the final result only (True or False). No need to show your solution. F || !(F && T || !F) && F
2. Give the valid relational expression for this statement: duration of game exceeds 30 minutes
3. Give the valid logical expression for this statement: fee is within 400 to 800
Chapter 3 Solutions
Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
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