U3: Nested If Statements

• How program executes code, makes decisions and organizes functions • How and which lines of code get executed

Lines executed from first to last; top to bottom

Computer makes choices on what to execute based on data.

switch (variable) { case “any”: case “ANY”: codea; break; default: codeb; break; }

W/out break function, program executes each next case until reaching “break”

• Similar to if-then-else statement • Useful when decision based on single character, word or value

Use “” for characters; no quotations for numbers

After every open brace, next line of code must be indented further

If-then-else statement programmed inside another if-then-else statement

Empty space/lines in the program

How code looks; Each person has a different coding style

• How/when comments used • # of spaces for indentation • Use of white space

• Naming of variables and functions • Code organization • Patterns used and avoided

• Set of rules outlining how person’s programming works • Workplaces and languages can have rules/conventions

• Communication is key so everybody can agree • Makes old code easier to understand

• Makes errors obvious • Explaining details important for style guide