APCSA - Math and Inputs in Java

PEMDAS

An acronym representing the order of operations in mathematics: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Division with a double

In Java, dividing an integer by a double (e.g., 3/6.0) gives a decimal result, such as 0.5.

Division with two integers

In Java, performing division with two integers (e.g., 3/6) truncates the decimal, resulting in 0.

Modulus operator (%)

An operator in Java that returns the remainder of a division operation.

Example of modulus

System.out.print(8%3) outputs 2 because the remainder of 8 divided by 3 is 2.

Scanner in Java

A class used to obtain user input in Java by importing java.util.*.

scanner.nextLine()

A method used to read input from the user as a string.

scanner.nextInt()

A method used to read an integer input from the user.

scanner.nextDouble()

A method used to read a double input from the user.