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 1.10CP

Chapter 1.5, Problem 1.12CP

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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?

Q.3. [Variables] What is difference between variable declaration and variable initialization? What two things are required to be specified while variable declaration? Conventions for Declaring Variables.

Chapter 1 Solutions

Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)

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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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