CS116 Chapter Notes - Chapter 6: Imperative Programming, Print Screen, Round-Off Error
24 Aug 2016
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Keep track of how the data changes as the program executes statements. Produce a value by having an effect on the screen print. Give your computer a sequence of commands to execute. Uses an interpreter like scheme (unlike most imperative languages) Generally, harder to debug with a compiler. May include function definitions made up of statements. Write using regular mathematical notation 5 * (3 + 4) 1. 2 numeric types: integers and floating point numbers instead of one. There are strings, booleans, and lists, but no characters or symbols. Expr is any python expression: evaluate expr, assign that value to v. Assignment statements do not produce a value; they only have an effect. Does not produce a value, but has an effect display info on screen. X = print 42. 8 print does not produce values, so you can"t assign one to x. Use print in the definitions window (top window) Result usually looks the same, but are different.
