Merge pull request #1561 from mahaveergurjar/loops-in-C#

Loops in c#

docs/languages/csharp/csharp-4.md

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+---
+id: loops-in-csharp
+sidebar_position: 4
+title: "Loops in C#"
+sidebar_label: "Loops in C#"
+---
+
+# 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:
+
+```csharp
+for (initialization; condition; increment/decrement) {
+    // code to be executed
+}
+```
+
+### Example:
+
+```csharp
+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:
+
+```csharp
+while (condition) {
+    // code to be executed
+}
+```
+
+### Example:
+
+```csharp
+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:
+
+```csharp
+do {
+    // code to be executed
+} while (condition);
+```
+
+### Example:
+
+```csharp
+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:
+
+```csharp
+foreach (type variable in collection) {
+    // code to be executed
+}
+```
+
+### Example:
+
+```csharp
+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:
+
+```csharp
+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:
+
+```csharp
+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!