# Introduction: Arithmetic Expressions

Here are the prerequisites, learning objectives, and overview for this chapter.

## We'll cover the following

## Prerequisites

## Objectives

After completing this chapter, you should be able to

- Write a Java arithmetic expression that represents a given algebraic expression
- Identify the data type of the value of a given arithmetic expression
- Write a type cast and identify when one is necessary
- Use the standard class
`Math`

to evaluate mathematical functions such as the square root and cosine

## Overview

Imagine that we have been asked to write a Java program to evaluate some algebraic equations in support of a particular scientist’s research project.
In the previous chapter, we saw some
simple expressions that involved multiplication, addition, and subtraction. This chapter will discuss in depth how to write an **arithmetic expression** in Java. Such expressions are analogous to expressions in algebra. Both kinds of expressions contain operators, variables, constants, and parentheses.

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