A sentimental robot

% gives the remainder of division. The result of 20%3 is 2. It is the most frequently used operator. There is a rule using it. If you divide 20 by 3, the range of th remainder that you get by % is from 0~2. Computer state is 0 or 1, which is called bit state. 28=256 , which 2 means 0 or 1. 8bit = 1byte 32bit = 4byte 64bit = 8byte - The first letter of the variable must be character, cannot start..

Calculator

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step 1. Creating a project File - New - Project step 2. Creating a class in the project Class names usually start with an uppercase letter. * At the upper right side is Open Perspective icon -> you can check Views which are useful in developing projects. * Font edition : Window - Preferences - General - Appearance * When you accidentally close a important menu like Package Explorer, Window - Sho..