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Loops in C#

Loops in C# allow you to execute a block of code repeatedly based on specific conditions.

1. For Loop​

The for loop is commonly used when the number of iterations is known.

Syntax:​

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

Example:​

for (int i = 0; i < 5; i++) {
    Console.WriteLine("Iteration " + i);
}

2. While Loop​

The while loop executes a block of code as long as the specified condition is true.

Syntax:​

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

Example:​

int i = 0;
while (i < 5) {
    Console.WriteLine("Iteration " + i);
    i++;
}

3. Do-While Loop​

The do-while loop is similar to the while loop but guarantees the code block will execute at least once.

Syntax:​

do {
    // code to be executed
} while (condition);

Example:​

int i = 0;
do {
    Console.WriteLine("Iteration " + i);
    i++;
} while (i < 5);

4. Foreach Loop​

The foreach loop is used to iterate over collections, such as arrays or lists.

Syntax:​

foreach (type variable in collection) {
    // code to be executed
}

Example:​

int[] numbers = {1, 2, 3, 4, 5};
foreach (int num in numbers) {
    Console.WriteLine("Number: " + num);
}

5. Break and Continue Statements​

a. Break Statement​

The break statement exits a loop prematurely.

Example:​

for (int i = 0; i < 10; i++) {
    if (i == 5) {
        break; // Exit the loop when i equals 5
    }
    Console.WriteLine("Iteration " + i);
}

b. Continue Statement​

The continue statement skips the current iteration and proceeds to the next one.

Example:​

for (int i = 0; i < 5; i++) {
    if (i == 2) {
        continue; // Skip the iteration when i equals 2
    }
    Console.WriteLine("Iteration " + i);
}

Summary​

Loops are essential in C# for repeating tasks and iterating over data structures efficiently. Understanding these loops and how to control them with break and continue will help you write more effective code.

Happy coding!