Variables:

Variables hold a piece of information and that information gets changed during the execution of the program.

It is a symbolic name to represent a location in RAM (Random Access Memory).

Variables permit to store and access the data that are present in the computer’s RAM.

Example:

Consider the following variables “speed”, “distance”, and “time” which stores value that changes during the program execution...

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Chapter 1.5, Problem 1.20CP

Chapter 1.5, Problem 1.22CP

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Variables and constants must be declared before they can be used in a program. Why is it important to declare a variable? How are constants declared differently than variables? Please explain your answer in 3 sentences or more.

What use does it serve to be able to define an initial value when you can just assign a value to a variable?

What's the point of being able to define an initial value when you can simply assign a value to a variable?

Chapter 1 Solutions

Starting Out With C++: Early Objects, Student Value Edition & Myprogramminglab With Pearson Etext -- Standalone Access Card Package, 9/e

Ch. 1.2 - Why is the computer used by so many different...Ch. 1.2 - List the five major hardware components of a...Ch. 1.2 - Internally, the CPU consists of what two units?Ch. 1.2 - Prob. 1.4CP Ch. 1.2 - Prob. 1.5CP Ch. 1.2 - Prob. 1.6CP Ch. 1.2 - What are the two general categories of software?Ch. 1.2 - Prob. 1.8CP Ch. 1.2 - What do you call a program that performs a...Ch. 1.2 - Word processing programs, spreadsheet programs,...

Ch. 1.3 - What is an algorithm?Ch. 1.3 - Why were computer programming languages invented?Ch. 1.3 - Prob. 1.13CP Ch. 1.3 - Prob. 1.14CP Ch. 1.3 - Prob. 1.15CP Ch. 1.3 - Prob. 1.16CP Ch. 1.3 - Prob. 1.17CP Ch. 1.5 - Describe the difference between a key word and a...Ch. 1.5 - Prob. 1.19CP Ch. 1.5 - Prob. 1.20CP Ch. 1.5 - Prob. 1.21CP Ch. 1.5 - Prob. 1.22CP Ch. 1.5 - What must take place in a program before a...Ch. 1.5 - Prob. 1.24CP Ch. 1.6 - What four items should you identify when defining...Ch. 1.6 - Prob. 1.26CP Ch. 1.6 - Prob. 1.27CP Ch. 1.6 - What is pseudocode?Ch. 1.6 - What is the difference between high-level...Ch. 1.6 - Describe what a compiler does with a programs...Ch. 1.6 - Prob. 1.31CP Ch. 1.6 - Prob. 1.32CP Ch. 1.6 - Prob. 1.33CP Ch. 1 - Computers can do many different jobs because they...Ch. 1 - The job of the _____ is to fetch instructions,...Ch. 1 - Internally, the CPU consists of the _____ and the...Ch. 1 - Prob. 4RQE Ch. 1 - The two general categories of software are _____...Ch. 1 - Prob. 6RQE Ch. 1 - Since computers cant be programmed in natural...Ch. 1 - _____is the only language computers really...Ch. 1 - Prob. 9RQE Ch. 1 - Prob. 10RQE Ch. 1 - A programs ability to run on several different...Ch. 1 - Words that have special meaning in a programming...Ch. 1 - Prob. 13RQE Ch. 1 - _____ are characters or symbols that perform...Ch. 1 - _____ characters or symbols mark the beginning or...Ch. 1 - Prob. 16RQE Ch. 1 - A(n) _____ is a named storage location.Ch. 1 - A variable must be _____ before it can be used in...Ch. 1 - The three primary activities of a program are...Ch. 1 - _____ is information a program gathers from the...Ch. 1 - _____ is information a program sends to the...Ch. 1 - A(n) _____ is a diagram that graphically...Ch. 1 - Prob. 23RQE Ch. 1 - What is the difference between system software and...Ch. 1 - Prob. 25RQE Ch. 1 - Prob. 26RQE Ch. 1 - Account Balance Write high-level and detailed...Ch. 1 - Sales Tax Write high-level and detailed pseudocode...Ch. 1 - The variable sum starts with the value 0. Add 10...Ch. 1 - The variable x starts with the value 0. The...Ch. 1 - The variable j starts with the value 10. The...Ch. 1 - The variable a starts with the value 1. The...Ch. 1 - Find the Error 33. The following pseudocode...Ch. 1 - Suppose one of your friends, who paints the...Ch. 1 - Candy Bar Sales Using Program 1-1 as an example,...Ch. 1 - Baseball Costs Using Program 1-1 as an example,...Ch. 1 - Flower Garden Write a program that calculates how...

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Solution Summary: The author explains that variables are symbolic names to represent a location in RAM (Random Access Memory). They store data that changes during the program execution.

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