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1. What is a program? A computer is extremely fast and extremely obedient, but it has no common sense. It does exactly what it is told, step by step. A program is a list of precise instructions that tells the computer...
1. A program that says more From now on, every example sits inside the frame from Session 1. Here's a program with several output lines: public class Intro { public static void main(String[] args) {...
1. Why variables? So far our programs only print fixed text. Real programs need to remember things: a user's age, a bank balance, a score. A variable is a named storage location in memory (RAM) that holds a value....
1. Arithmetic operators Operator Meaning Example Result + Add 7 + 2 9 - Subtract 7 - 2 5 * Multiply 7 * 2 14 / Divide 7 / 2 3 (not 3.5!) % Remainder (modulus) 7 % 2 1 Integer division: the number-one surprise When both...