Can someone explain how nested loops work in Java?
Asked by
CuriousCoder42
I'm trying to wrap my head around nested loops in Java. I wrote some code, but it feels like I'm just copying what my teacher did without understanding it. Here's my code:
```java
int start = scanner.nextInt();
int table = 0;
for (int i = 1; i <= start; i++) {
for (int j = 1; j <= start; j++) {
table = i * j;
IO.print(table + " ");
}
IO.println();
}
```
I want to understand the logic behind these loops better. Can someone explain how they work, especially why the variable 'j' corresponds to columns? Sorry if my English isn't great!
Answers
Nested loops can be tricky, but here's the gist: every time the outer loop (controlled by 'i') runs, the inner loop (controlled by 'j') runs through all its iterations. Think of 'i' as the current row you're working on, and 'j' as the columns within that row. So, for each value of 'i', you'll go through all values of 'j'. They don’t have any special meanings—just what you assign to them!
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LearningLingo24: Ohh, I see! So it's like each 'i' is a new row, and 'j' just goes through each column.