A symbol or container that holds a value.
A variable has a type and a value. Variable names should be written in lowerCamelCase, and the name should indicate what value the variable represents.
For example, if we wanted to make a variable in Java to represent the number of apples we have, we would write:
int numApples = 9;This makes a variable of type int, and sets its initial value to 9. We want the type to be int because this variable will hold an integer value (a whole number).