Nested for loops
A for loop inside a for loop is called a nested for loop. Sometimes this is the right tool for the job. Here's an example where you print out a multiplication table. Notice that we set the Maximum number if iterations as a variable. You could even prompt the user for this value making the for loop even more flexible.
Example: Print out the multiplication table.
public class MultiplicationTable {
static final int MAX = 10;
public static void main (String[] args) {
int row, column;
for (row = 1; row <= MAX; row++) {
for (column = 1; column <= MAX; column++)
{
System.out.print(row * column + "\t");
}
System.out.println();//Takes us to the next line
}
}
}
Table generated from the program
1 2 3 4 5 6 7 8 9 10 2 4 6 8 10 12 14 16 18 20 3 6 9 12 15 18 21 24 27 30 4 8 12 16 20 24 28 32 36 40 5 10 15 20 25 30 35 40 45 50 6 12 18 24 30 36 42 48 54 60 7 14 21 28 35 42 49 56 63 70 8 16 24 32 40 48 56 64 72 80 9 18 27 36 45 54 63 72 81 90 10 20 30 40 50 60 70 80 90 100