Loops

Different Types of Loop

• For loop
• While loop
• Do-while loop
• For-each loop

For loop

For loop is a control structure in programming that allows you to repeat a block of code a specific number of times.

for (initialization; condition; increment) {
    // Code to be executed
}

1. Initialization: This step runs once at the beginning and is usually used to define and set the loop counter.

1. Condition: Before each iteration, this condition is evaluated. If it is true, the loop continues; if false, the loop ends.

2. Increment: This step updates the loop counter after each iteration.

EXAMPLE

For Loop Example: Printing Numbers from 1 to 10

// This program prints the numbers from 1 to 10, inclusive.
for (int i = 1; i <= 10; i = i + 1) {
    System.out.println(i);
}

Explanation of above code

• Initialization: int i = 1
  Starts the counter at 1.

• Condition: i <= 10
  Continues the loop while i is less than or equal to 10.

• Increment: i = i + 1
  Increases i by 1 after each iteration.

• Loop Body:
  Executes System.out.println(i); to print the current value of i to the console, outputting numbers from 1 to 10.

While loop

The while loop loops through a block of code as long as a specified condition is true

while (condition) {
  // code block to be executed
}

EXAMPLE

While Loop Example: Printing Numbers from 1 to 10

// This program prints the numbers from 1 to 10 using a while loop.
int i = 1; // Initialization
while (i <= 10) { // Condition
    System.out.println(i); // Loop Body
    i++; // Increment
}

Explanation

• Initialization:

• int i = 1;
  Initializes the counter variable i to 1.

• Condition:

• while (i <= 10)
  Checks if i is less than or equal to 10. The loop executes while this condition is true.

• Loop Body:

• System.out.println(i);
  Prints the current value of i to the console.

• Increment:

• i++;
  Increments i by 1 after each iteration.

For loop and while loop are similar When we dont know the stop value,we can prefer while loop instead