1.Print this pattern 

000000

000000

000000

000000

Explaination:

Goal:

We want to print 4 rows, and each row has 6 zeroes.

🔁 Outer loop (for (int i = 0; i < rows; i++))

• Controls how many lines you print.

• Runs 4 times (because rows = 4).

• Each time it runs, it prints one full line of 6 zeroes.

🔁 Inner loop (for (int j = 0; j < columns; j++))

• Controls how many zeroes are printed in one line.

• Runs 6 times for each row (because columns = 6).

• System.out.print("0") prints 0s without a new line.

🔁 After inner loop:

• System.out.println(); moves the cursor to the next line after printing 6 zeros.