Algorithms and Programs- Control Structures

Also refered to as PROGRAMMING CONSTRUCTS.

Control Structures tell how the instructions you write should be executed or processed.

They determine how the steps in your algorithm or program should flow.

• Sequential

• Selection (conditional)

• Iteration (Repetition / loop)

• Sequential- the instructions are processed (executed) in the order they are written.

• Selection- makes a decision between one or more options.

• Iteration- repeat a set of instructions for a number of times.

1.Ask user to enter 3 numbers

2.Computer accepts numbers

3.Find the sum of the 3 numbers

4.Divide the sum by 3

5.Print Answer

• Ask user to enter 3 numbers

• Computer accepts numbers

• Find the sum of the numbers and store it in the variable total

• If total is greater than 40 then display “very good” ELSE

  Display “too bad”

Set X to start at 1; (X = 1)

Repeat the instructions:

1. Ask user to enter 3 numbers

2.Computer accepts numbers

3.Find the sum of the 3 numbers

4.Divide the sum by 3

5.Print Answer

6.Add 1 to X

Until X becomes 20