COMP 202 Lecture Notes - Lecture 3: Real Number, State Diagram, Floating Points

• School: McGill University
• Department: Computer Science (Sci)
• Course: COMP 202
• Professor: Daniel Kirshbaum

Document Summary

If you write an equation with an integer, java will return an integer. If you put a decimal, jave will not round to the nearest integer. ] Comp 202 lecture 3 variables, primitive data types, operators. [note on the last lecture: Why do we use variables: code readability, code generalisation, temporary storage for manipulation. [variables must be assigned before they can be used: declaration, initialistation, manipulation. Conventions for names (lowercamelcase): don"t start with $ Start with the lower case but then capitalise the first letter of each word inside the name of the variable. Short but not too short: name it something descriptive of its purpose and content, unique. Good eg. catname, tempf, hour, classcode. Bad eg. asfdstow, dateoftoday, urstupid, capitalsanywhere. Remember: java is case sensitive. You can declare multiple variales of the same type on one line. Variable declarations are statements they appear inside the method.