Java: An Introduction to Problem Solving and Programming, 8th Edition

Chapter Summary

• A variable can hold values, such as numbers. The type of the variable must match the type of the value stored in the variable.

• Variables and all other items in a program should be given names that indicate how they are used. These names are called identifiers in Java.

• All variables should be given an initial value before you use them in the program. You can do this using an assignment statement, optionally combined with the variable declaration.

• Parentheses in arithmetic expressions indicate the order in which the operations are performed.

• When you give a value to a variable by using an assignment statement, the data type of the variable must be compatible with the type of the value. Otherwise, a type cast is necessary.

• The methods ...