Pseudocode
- 2. What is An informal way of writing a program High level description Text base Algorithmic
- 3. Common pseudocode notation INPUT – indicates a user will be inputting something OUTPUT – indicates that an output will appear on the screen WHILE – a loop (iteration that has a condition at the beginning) FOR – a counting loop (iteration) REPEAT – UNTIL – a loop (iteration) that has a condition at the end IF – THEN – ELSE – a decision (selection) in which a choice is made any instructions that occur inside a selection or iteration are usually indented
- 5. Sequence Summation of two numbers Input number1 Input number2 Total= number1+number2 Output total
- 6. Selection
- 7. IF ... THEN ... ELSE ... IF x>=1 then Print “x is positive”; ELSE IF x==0 then Print “x is 0” ELSE IF x<0 then Print “x is negative” END IF
- 8. If isDigit(x) then If x==0 then Print “x is o” Else if x>0 then Print “x is positive” Else Print “x is a character” Nested If Statements
- 9. Case Statement (Switch) CASE x OF 1: Do this thing 2: Do the other thing 3: Self-destruct ELSE Write “You must choose 1, 2 or 3” END CASE
- 10. Iteration FOR count = 1 to 10 DO Write count x 3 NEXT count count = 1 REPEAT Write count x 3 count = count + 1 UNTIL count = 10 WHILE not eof(StudentFile) DO Read (StudentFile) Write surname,firstname,grade END WHILE