KwickClips Java · 42 sec · free
What is a dry run?
Short answer. Running the code by hand on paper before the computer does.
What do you write in a trace table?
Every value of i, every value of j, and what each row prints.
Trace table
| i | j runs | Prints |
|---|---|---|
| 1 | 3 | 3 |
| 2 | 3, 2 | 32 |
| 3 | 3, 2, 1 | 321 |
Remember
| Write every i and j |
| One row per outer iteration |
Board papers ask for output without a computer. Here is how. Write i, then every j. Row one prints three. Row two, three two. Row three, three two one. Remember. Write every i and j. One row per outer round.
This clip is from the full lesson: Nested Loops, Patterns and Number Programs — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: ICSE Class 9 Computer Applications, ICSE Class 9 Computer Applications, ICSE Class 9 Computer Applications, ICSE Class 10 Computer Applications
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