Revision of HLLs: Conditional statements Loops Input validation etc.

1. High Level Programming Constructs

2. Conditional Statements (IF)
What does this extract of code do?

3. The CASE statement

4. Nested Loops
What does this extract of code do?

5. Conditional Loops
Pseudocode:
Get Password
While Password <> ValidPassword
Message “Invalid Password”
Get Password
End While

6. Input Validation
Pseudocode:
Get Age
If Age < 0 or Age > 100 Then
Display Message “Please Enter a Valid Age”
End If

7. Variable Scope
Local variable
 Variable only accessible by the module in which it
is declared
Global variable
 Variable is accessible throughout the entire
program