AP CSA Unit 1: Lesson 4 - Number Calculations

calculations

+, -, *, /

arithmetic operators

the standard four everyone learns in math: the '+' and '-' symbols work as we might expect, and the symbols '×' and '÷' are replaced with '*' and '/' respectively

assignment operator

we use the '=' symbol as an assignment operator when we have a number or a calculation on the right-hand side: the variable on the left-hand side will be set to the value of whatever is on the right-hand side

operator precedence

Java follows the same order of operations we're familiar with from math class

ArithmeticException error

error after dividing by 0

compound assignment operators

used in place of the normal '=' assignment operator and change the value of a variable

unary operators

X++ and x--

increment

increase by 1

decrement

decrease by 1