Java Tutorial: For Each Loop in Java

• For each loop is an enhanced version of for loop.
• It travels each element of the data structure one by one.
• Note that you can not skip any element in for loop and it is also not possible to traverse elements in reverse order with the help of for each loop.
• It increases the readability of the code.
• If you just want to simply traverse an array from start to end then it is recommended to use for each loop.
• Syntax :

/* for (int element:Arr) {
            Sout(element);    //Prints all the elements
} */

• Example

class CWH_forEachLoop{  
  public static void main(String args[]){  
   //declaring an array  
   int arr[]={1,2,3,3,4,5};  
   //traversing the array with for-each loop  
   for(int i:arr){  
     System.out.println(i);  
   }  
 }   
}  

• Output

1
2
3
4
5

Code as Described in the Video

package com.company;

public class cwh_27_arrays {
    public static void main(String[] args) {

        /*
        float [] marks = {98.5f, 45.5f, 79.5f, 99.5f, 80.5f};
        String [] students ={"Harry", "Rohan", "Shubham", "Lovish"};
        System.out.println(students.length);
        System.out.println(students[2]);
        */

        int [] marks = {98, 45, 79, 99, 80};
        // System.out.println(marks.length);

        // Displaying the Array (Naive way)
        System.out.println("Printing using Naive way");
        System.out.println(marks[0]);
        System.out.println(marks[1]);
        System.out.println(marks[2]);
        System.out.println(marks[3]);
        System.out.println(marks[4]);

        // Displaying the Array (for loop)
        System.out.println("Printing using for loop");
        for(int i=0;i<marks.length;i++){
            System.out.println(marks[i]);
        }

        // Quick Quiz: Displaying the Array in Reverse order (for loop)
        System.out.println("Printing using for loop in reverse order");
        for(int i=marks.length -1;i>=0;i--){
            System.out.println(marks[i]);
        }

        // Quick Quiz: Displaying the Array (for-each loop)
        System.out.println("Printing using for-each loop");
        for(int element: marks){
            System.out.println(element);
        }

    }
}

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