In this tutorial, we will learn about the Java for-each loop and its difference with for loop with the help of examples.<\/p>\n\n\n\n
In Java, the\u00a0for-each<\/strong>\u00a0loop is used to iterate through elements of\u00a0arrays\u00a0and collections (like\u00a0ArrayList). It is also known as the enhanced for loop.<\/p>\n\n\n\n The syntax of the Java for-each<\/strong> loop is:<\/p>\n\n\n\n Here,<\/p>\n\n\n\n Output<\/strong><\/p>\n\n\n\n Here, we have used the for-each loop<\/strong> to print each element of the numbers<\/var> array one by one.<\/p>\n\n\n\n Output<\/strong>:<\/p>\n\n\n\n In the above program, the execution of the As we can see, we have added each element of the numbers<\/var> array to the sum<\/var> variable in each iteration of the loop.<\/p>\n\n\n\n Let’s see how a\u00a0 Output<\/strong>:<\/p>\n\n\n\n Output<\/strong>:<\/p>\n\n\n\n Here, the output of both programs is the same. However, the for-each<\/strong> loop is easier to write and understand.<\/p>\n\n\n\n
\n\n\n\nfor-each Loop Sytnax<\/h2>\n\n\n\n
for(dataType item : array) {\n ...\n}<\/code><\/pre>\n\n\n\n
\n\n\n\nExample 1: Print Array Elements<\/h2>\n\n\n\n
\/\/ print array elements \n\nclass Main {\n public static void main(String[] args) {\n \n \/\/ create an array\n int[] numbers = {3, 9, 5, -5};\n \n \/\/ for each loop \n for (int number: numbers) {\n System.out.println(number);\n }\n }\n}<\/code><\/pre>\n\n\n\n3\n9\n5\n-5\n<\/samp><\/code><\/pre>\n\n\n\n
\n\n\n\nExample 2: Sum of Array Elements<\/h2>\n\n\n\n
\/\/ Calculate the sum of all elements of an array\n\nclass Main {\n public static void main(String[] args) {\n \n \/\/ an array of numbers\n int[] numbers = {3, 4, 5, -5, 0, 12};\n int sum = 0;\n\n \/\/ iterating through each element of the array \n for (int number: numbers) {\n sum += number;\n }\n \n System.out.println(\"Sum = \" + sum);\n }\n}<\/code><\/pre>\n\n\n\nSum = 19<\/samp><\/pre>\n\n\n\n
for each<\/code> loop looks as:<\/p>\n\n\n\nIteration<\/th> Variables<\/th><\/tr> 1<\/td> number<\/var> = 3
sum<\/var> = 0 + 3 = 3<\/td><\/tr>2<\/td> number<\/var> = 4
sum<\/var> = 3 + 4 = 7<\/td><\/tr>3<\/td> number<\/var> = 5
sum<\/var> = 7 + 5 = 12<\/td><\/tr>4<\/td> number<\/var> = -5
sum<\/var> = 12 + (-5) = 7<\/td><\/tr>5<\/td> number<\/var> = 0
sum<\/var> = 7 + 0 = 7<\/td><\/tr>6<\/td> number<\/var> = 12
sum<\/var> = 7 + 12 = 19<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\nfor loop Vs for-each loop<\/h2>\n\n\n\n
for-each<\/code>\u00a0loop is different from a regular\u00a0Java for loop.<\/p>\n\n\n\n1. Using for loop<\/h3>\n\n\n\n
class Main {\n public static void main(String[] args) {\n \n char[] vowels = {'a', 'e', 'i', 'o', 'u'};\n\n \/\/ iterating through an array using a for loop\n for (int i = 0; i < vowels.length; ++ i) {\n System.out.println(vowels[i]);\n }\n }\n}<\/code><\/pre>\n\n\n\na\ne\ni\no\nu<\/samp><\/code><\/pre>\n\n\n\n2. Using for-each Loop<\/h3>\n\n\n\n
class Main {\n public static void main(String[] args) {\n\n char[] vowels = {'a', 'e', 'i', 'o', 'u'};\n \n \/\/ iterating through an array using the for-each loop\n for (char item: vowels) {\n System.out.println(item);\n }\n }\n}<\/code><\/pre>\n\n\n\na\ne\ni\no\nu<\/samp><\/code><\/pre>\n\n\n\n