Java for Inside for Statements

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Nested for in java

Nested for is for loop inside for loop. for loop block can contain more for loop blocks. You can place multiple for loops inside one for loop. You can place for loops one inside the other.

nested for in Java - Syntax

for(initialization statement;
		termination statement that returns true or false;
		loop counter){
	for(initialization statement;
		termination statement that returns true or false;
		loop counter){
	statement;
	}
}

for inside for - Java Example 1

public class NestedForLoop {
public static void main(String a[]){
	for(int i=0; i<5;i++)
	{
		for(int j=5; j>0;j--)
		{
			System.out.print("" + i
				+ "," + j + " | ");
		}
		System.out.println();
	}
}
}

0,5 | 0,4 | 0,3 | 0,2 | 0,1 |
1,5 | 1,4 | 1,3 | 1,2 | 1,1 |
2,5 | 2,4 | 2,3 | 2,2 | 2,1 |
3,5 | 3,4 | 3,3 | 3,2 | 3,1 |
4,5 | 4,4 | 4,3 | 4,2 | 4,1 |

for inside for in Java - Example 2

public class NestedForLoop2 {
public static void main(String a[]){
	for(int i=0; i<2;i++)
	{
	 for(int j=3; j>0;j--)
	 {
	   for(int k=0; k<2;k++)
	   {
	   System.out.print("" + i + ","
			+ j + "," + k + " | ");
 	   }
	    System.out.println();
	 }
	System.out.println();
	}
}
}

0,3,0 | 0,3,1 |
0,2,0 | 0,2,1 |
0,1,0 | 0,1,1 |

1,3,0 | 1,3,1 |
1,2,0 | 1,2,1 |
1,1,0 | 1,1,1 |

for inside for - Java Example 3

public class NestedForLoop3 {
public static void main(String a[]){
 for(int i=0; i<2;i++)
 {
  for(int j=3,k=0; j>0 && k<2;j--,k++)
  {
	System.out.print("" + i + ","
				+ j + "," + k + " | ");
  }
 System.out.println();
 }
}
}

0,3,0 | 0,2,1 |
1,3,0 | 1,2,1 |

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