Java for-each Loop: Syntax and Usage Explained

For-each loop

• The for-each loop introduced in Java5.
• It is mainly used to traverse array or collection elements.
• The advantage of for-each loop is that it eliminates the possibility of bugs and makes the code more readable.
• It works on elements basis not index.
• It returns element one by one in the defined variable.
• It is easier to use than simple for loop because we don't need to increment value and use subscript notation.

Syntax

for(Type var:array){  
    //code to be executed  
}

for(data_type variable : array | collection){  
    //code to be executed  
}

Java For-Each Loop Flowchart

Example of for each Loop

/*
Demonstrate the for each loop.
save file "ForEachExample.java".
*/

public class ForEachExample {
public static void main(String[] args) {
    int array[]={10,11,12,13,14};
    for(int i:array){
        System.out.println(i);
    }
  }
}

Output:

10
11
12
13
14
Press any key to continue . . .

Example of for each Loop

/*
Demonstrate the for each loop.
save file "ForEachExample.java".
*/

import java.util.*;
class ForEachExample{
  public static void main(String args[]){
   ArrayList list=new ArrayList();
   list.add("Rumman");
   list.add("Jaman");
   list.add("Student");

   for(String s:list){
     System.out.println(s);
   }

 }
}

Output:

Rumman
Jaman
Student
Press any key to continue . . .