Difference between pass by value and pass by reference:

Pass by value Pass by reference:

A copy of the argument’s value which is passed into the parameter variable is referred as pass by value.

Pass by reference allows the argument to passed into a special type of parameter called reference variable.

In the pass by value, the called module creates new variables to store the value of the arguments passed to it.

The reference variables permit the module to access the original argument of the parameter.

The changes made in the formal parameters do not reflect on the actual parameters...

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Chapter 3.4, Problem 3.17CP

Chapter 3.5, Problem 3.19CP

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Chapter 3 Solutions

Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)

Ch. 3.1 - What is a module?Ch. 3.1 - Prob. 3.2CP Ch. 3.1 - Prob. 3.3CP Ch. 3.1 - Prob. 3.4CP Ch. 3.1 - Prob. 3.5CP Ch. 3.2 - In most languages, a module definition has what...Ch. 3.2 - Prob. 3.7CP Ch. 3.2 - Prob. 3.8CP Ch. 3.2 - Prob. 3.9CP Ch. 3.3 - What is a local variable? How is access to a local...

Ch. 3.3 - What is a variables scope?Ch. 3.3 - Prob. 3.12CP Ch. 3.3 - Prob. 3.13CP Ch. 3.4 - Prob. 3.14CP Ch. 3.4 - What are the variables that receive pieces of data...Ch. 3.4 - Prob. 3.16CP Ch. 3.4 - Prob. 3.17CP Ch. 3.4 - Prob. 3.18CP Ch. 3.5 - What is the scope of a global variable?Ch. 3.5 - Give one good reason that you should not use...Ch. 3.5 - Prob. 3.21CP Ch. 3 - A group of statements that exist within a program...Ch. 3 - Prob. 2MC Ch. 3 - The first line of a module definition is known as...Ch. 3 - Prob. 4MC Ch. 3 - Prob. 5MC Ch. 3 - A design technique that programmers use to break...Ch. 3 - Prob. 7MC Ch. 3 - A _____ is a variable that is declared inside a...Ch. 3 - A(n) ____ is the part of a program in which a...Ch. 3 - A(n) ____ is a piece of data that is sent into a...Ch. 3 - A(n) ____ is a special variable that receives a...Ch. 3 - When _____, only a copy of the argument's value is...Ch. 3 - When ____, the module can modify the argument in...Ch. 3 - A variable that is visible to every module in the...Ch. 3 - When possible, you should avoid using _____...Ch. 3 - The phrase divide and conquer means that all of...Ch. 3 - Prob. 2TF Ch. 3 - Module names should be as short as possible.Ch. 3 - Prob. 4TF Ch. 3 - A flowchart shows the hierarchical relationships...Ch. 3 - Prob. 6TF Ch. 3 - A statement in one module can access a local...Ch. 3 - In most programming languages, you cannot have two...Ch. 3 - Programming languages typically require that...Ch. 3 - Most languages do not allow you to write modules...Ch. 3 - When an argument is passed by reference, the...Ch. 3 - Prob. 12TF Ch. 3 - Prob. 1SA Ch. 3 - Prob. 2SA Ch. 3 - Prob. 3SA Ch. 3 - What is a local variable? What statements are able...Ch. 3 - In most languages, where does a local variables...Ch. 3 - What is the difference between passing an argument...Ch. 3 - Prob. 7SA Ch. 3 - Design a module named timesTen. The module should...Ch. 3 - Examine the following pseudocode module header,...Ch. 3 - Look at the following pseudocode module header:...Ch. 3 - Assume that a pseudocode program contains the...Ch. 3 - Design a module named getNumber, which uses a...Ch. 3 - What will the following pseudocode program...Ch. 3 - What will the following pseudocode program...Ch. 3 - Find the error in the following pseudocode. Module...Ch. 3 - Find the error in the following pseudocode. Module...Ch. 3 - Find the potential error in the following...Ch. 3 - Prob. 4DE Ch. 3 - Kilometer Converter Design a modular program that...Ch. 3 - Prob. 2PE Ch. 3 - How Much Insurance? Many financial experts advise...Ch. 3 - Prob. 4PE Ch. 3 - Prob. 5PE Ch. 3 - Prob. 6PE Ch. 3 - Calories from Fat and Carbohydrates A nutritionist...Ch. 3 - Prob. 8PE Ch. 3 - Prob. 9PE Ch. 3 - Monthly Sales Tax A retail company must file a...Ch. 3 - Prob. 11PE

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Pass by value	Pass by reference:
A copy of the argument’s value which is passed into the parameter variable is referred as pass by value.	Pass by reference allows the argument to passed into a special type of parameter called reference variable.
In the pass by value, the called module creates new variables to store the value of the arguments passed to it.	The reference variables permit the module to access the original argument of the parameter.
The changes made in the formal parameters do not reflect on the actual parameters...

Solution Summary: The author explains the difference between pass by value and passing by reference. The declaration of the reference variable is same as the regular variable declaration, except an ampersand.

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