For Loops in Java

• Note that instead of var or const in JavaScript, you write int, because you need to specify the type of data that is being used.
• Regarding scope, everything in Java is more block oriented.

Examples

Several examples are those found in A Guide to Java Loops

Simple For Loop

for (int i = 0; i < 5; i++) {
  System.out.println("Simple for loop: i = " + i);
}

Infinite for loop

for ( ; ; ) {
}

Labeled for loop

aa: for (int i = 1; i <= 3; i++) {
  if (i == 1)
    continue;
bb: for (int j = 1; j <= 3; j++) {
      if (i == 2 && j == 2) {
          break aa;
      }
      System.out.println(i + " " + j);
  }
}

Enhanced for loop

Array

int[] intArr = { 0,1,22,33,40 }; 
for (int num : intArr) {
  System.out.println("Enhanced for-each loop: i = " + num);
}

String

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

Map

for (Entry<String, Integer> entry : map.entrySet()) {
  System.out.println(
    "Key: " + entry.getKey() + 
    " - " + 
    "Value: " + entry.getValue());
}

For Each

List<String> names = new ArrayList<>();
names.add("Mabel");
names.add("Razzle");
names.add("Luna");
names.add("Finn");
names.add("Pip");

names.forEach(name -> System.out.println(name));

Resources

• A Guide to Java Loops - https://www.baeldung.com/java-loops
• Oracle docs - https://docs.oracle.com/javase/tutorial/java/nutsandbolts/for.html