For each loop java w3schools

For each loop java w3schools

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Loops in Java - W3Schools

Loops are used to execute a block of code repeatedly for a specified number of times. In Java, there are several types of loops: for loop, while loop, do-while loop.

For Loop

A for loop is used when you know in advance how many times you want to loop through the code. It starts with the initialization of a counter variable, then checks a condition, and finally increments the counter.

Here's an example:

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

This will print out "Hello 0", "Hello 1", "Hello 2", "Hello 3", and "Hello 4".

While Loop

A while loop is used when you don't know in advance how many times you'll need to loop through the code. It continues executing the code as long as a condition is true.

Here's an example:

int i = 0;
while (i < 5) {
System.out.println("Hello " + i);
i++;
}

This will also print out "Hello 0", "Hello 1", "Hello 2", "Hello 3", and "Hello 4".

Do-While Loop

A do-while loop is similar to a while loop, but it executes the code at least once before checking the condition.

Here's an example:

int i = 0;
do {
System.out.println("Hello " + i);
i++;
} while (i < 5);

This will also print out "Hello 0", "Hello 1", "Hello 2", "Hello 3", and "Hello 4".

Break and Continue Statements

The break statement is used to exit a loop immediately. The continue statement is used to skip the current iteration of a loop.

Here's an example:

for (int i = 0; i < 5; i++) {
if (i == 2) {
break;
}
System.out.println("Hello " + i);
}

This will only print out "Hello 0" and "Hello 1".

Here's another example:

for (int i = 0; i < 5; i++) {
if (i == 2) {
continue;
}
System.out.println("Hello " + i);
}

This will print out "Hello 0", "Hello 1", and "Hello 3" and "Hello 4".

Fibonacci Series using Loops

Here's an example of how you can use loops to generate the Fibonacci series:

public class Main {
public static void main(String[] args) {
int t1 = 0, t2 = 1;
for (int i = 0; i < 10; i++) {
System.out.print(t1 + " ");
int sum = t1 + t2;
t1 = t2;
t2 = sum;
}
}
}

This will print out the first 10 numbers in the Fibonacci series: 0, 1, 1, 2, 3, 5, 8, 13, 21, and 34.

I hope this helps! Let me know if you have any questions.

For each loop JavaScript

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