String concatenation
Place marking and pass variable
Multiple place markings and pass variables
Using mathematical operators
Using IF-ELSE statement
Using BOOLEAN variable and IF-ELSE statement
Using ternary operators
Using multiple IF statements

Using one variable multiple times and multiple IF statements
Compound boolean statement
Using nested IF-ELSE statement
Using OR operator
Using SWITCH-CASE statement
Using SWITCH-CASE statement

shorter version of Act 12.cs
Using WHILE loop and ITERATION
Using DO-WHILE construct
Using arrays and WHILE loop
Using FOREACH, FOR, and WHILE loop
Ways of declaring and initialising array
Using array and assigning values to its elements
Using array and assigning values to its elements