Performing a Dry Run Test
- Choose an algorithm or program to test.
- Manually execute it step by step, tracing its execution.
- Record the execution steps and outcomes in a trace table.
- Identify any defects or errors.
Example 1: Find the Maximum of Two Numbers
Algorithm: Read two numbers a and b. If a > b, max = a. Else, max = b. Print max.
Dry run (a = 5, b = 3): Since a > b, max = 5. Output: 5.
Example 2: Sum of All Even Numbers From 1 to n
Algorithm: Initialize sum = 0. For i = 1 to n, if i is even, sum = sum + i. Print sum.
Dry run (n = 5): i=1 (odd, skip), i=2 (even, sum=2), i=3 (odd, skip), i=4 (even, sum=6), i=5 (odd, skip). Output: 6.
