KwickClips Java · 43 sec · free
How many prints does a 3 by 3 nested loop make?
Short answer. Nine.
What happens to j on a new row?
It restarts from 1.
i rows, j columns
| i | j | Prints |
|---|---|---|
| 1 | 1, 2, 3 | 3 items |
| 2 | 1, 2, 3 | 3 items |
| 3 | 1, 2, 3 | 3 items |
Remember
| Inner runs fully each time |
| Total = outer × inner |
Outer loop three times, inner loop three times. How many prints? Follow the grid. Row one, j runs fully. Row two, j restarts at one. Row three, the same again. Remember. Inner runs fully each time. Three times three is nine.
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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