Selection - The pathway through a program is selected by using a condition to decide on what instructions to execute next.

If Statement - Type of selection statement that is only executed when a condition is met

Else If - A statement that only triggers if the if statement condition is not met (FALSE) and the else if condition is met (TRUE)

Else - A statement that is only triggered if the IF statement condition is not met (FALSE) and any other else if statements are not met.

Comparison - Two data items are compared to produce a logical, TRUE or FALSE, output.

Indentation - Spaces put at the beginning of line of code to help show the programs structure 

Nesting - When control structures are inserted within other control structures.