Key Concepts of Programing

Key Concepts of Programing

1. Keywords

   • Validation: This is to stop errors from occurring in the program
   • While loop: a loop that keeps going until the user inputs the correct data
   • Input: Data that is put into the program
   • Concatinate: variables are joined with strings using speech marks and the + operator. This is used when printing useful information to the end user
   • Program: A computer that has coded instructions to perform a task.
   • Algorithem: A set of rules to be followed e.g flowchart
   • Break: Gets you out of a loop.
   • Output: Data that us produced from a program
   • Variable: Values which are stored to help the program function properly
   • Function: Sections of code that are executed when they are needed

2. Arrays.

   • .append is used to add an item
   • .remove is used to delete a particular value from a list
   • .pop is used to delete a particular index
   • Indexes start at 0

3. Loops.

   • Break - Using "break" in your code will get you out of a loop.
   • While loops - This is good for validation such as preventing the user from entering numbers when the program requires letters.
   • For loops - This is a type of loop that can be customised. By this i mean you can set it to how every many times you want the code to loop

4. Conventions

   • Variable - These can have more than one word and would use underscores. For example, a variable called user input would be called user_input
   • Functions - These usually "take in" data, process it, and "return" a result. Once a function is written, it can be used over and over and over again
   • Commenting - When coding, you would would comment code to show you understand it and to show what the code is doing. To comment use #