added content to if-else/switch/goto under control flow & statements inside c++ roadmap

src/data/roadmaps/cpp/content/if-else--switch--goto@bjpFWxiCKGz28E-ukhZBp.md

@@ -1 +1,98 @@
-# if else / switch / goto
+# If-Else / Switch / Goto
+
+## If-Else Statement
+
+The `if-else` statement allows conditional execution based on boolean expressions.
+
+```cpp
+#include <iostream>
+
+int main() {
+    int num = 10;
+
+    // Check if the number is positive, negative, or zero
+    if (num > 0) {
+        std::cout << "Number is positive" << std::endl;
+    } else if (num < 0) {
+        std::cout << "Number is negative" << std::endl;
+    } else {
+        std::cout << "Number is zero" << std::endl;
+    }
+    return 0;
+}
+```
+
+### Explanation:
+- If `num` is greater than zero, it prints "Number is positive."
+- If `num` is less than zero, it prints "Number is negative."
+- Otherwise, it prints "Number is zero."
+
+---
+
+## Switch Statement
+
+The `switch` statement is used when multiple conditions depend on a single variable.
+
+```cpp
+#include <iostream>
+
+int main() {
+    int choice = 2;
+
+    // Evaluating different cases based on the value of 'choice'
+    switch (choice) {
+        case 1:
+            std::cout << "You chose option 1" << std::endl;
+            break; // Exit switch after executing this case
+        case 2:
+            std::cout << "You chose option 2" << std::endl;
+            break;
+        case 3:
+            std::cout << "You chose option 3" << std::endl;
+            break;
+        default:
+            std::cout << "Invalid choice" << std::endl;
+    }
+    return 0;
+}
+```
+
+### Explanation:
+- Depending on the value of `choice`, a corresponding message is printed.
+- The `break` statement ensures that the control exits after the matched case.
+- If no cases match, the `default` case executes.
+
+---
+
+## Goto Statement
+
+The `goto` statement allows jumping to a labeled statement within a function.
+
+```cpp
+#include <iostream>
+
+int main() {
+    int num = 5;
+    
+    // If condition is met, jump to 'label'
+    if (num < 10)
+        goto label;
+    
+    std::cout << "This will be skipped" << std::endl;
+    
+    label:
+    std::cout << "Jumped to label" << std::endl;
+    
+    return 0;
+}
+```
+
+### Explanation:
+- If `num` is less than 10, execution jumps to `label`.
+- The statement between `if` and `label:` is skipped.
+
+Visit the following resources to learn more:
+
+- [@video@if-else/The 'if-else' Statement in C++](https://www.youtube.com/watch?v=9-BjXs1vMSc)
+- [@video@switch/Learn C++ With Me - Switch Statement](https://www.youtube.com/watch?v=uOlLs1OYSSI)
+- [@video@goto/C++ Tutorial for Beginners - Break, Continue, and Goto](https://www.youtube.com/watch?v=ikGk4ZZ-uYE&t=14s)