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Javascript Introduction

Welcome to Programming

  • Recall that PNGs are graphic files.

The Language of Programming:

  • Syntax - Vocabulary, formatting, and grammer
  • Keyword - A language’s vocabulary.
  • Values - the information a variable holds
  • Control Structures - controls the flow of the program
  • Commands (functions) - The commands we ask a program to complete.

Doing Things With Functions:

  • Functions are collections of code that do something.
  • Functions should really only perform one function. This makes understanding and reading the function much easier.
  • Functions are declared using the keyword function.
  • To call a function, call the name with its arguments in parenthesis.

Adding New Graphics:

  • You can call functions by doing functionName(arguments)

Control the Flow with Conditional Statements:

  • Conditional statements allow you to change how your program works
  • Conditional statements allow you to react to the conditions the program is in.