Update control-flow--statements@s5Gs4yF9TPh-psYmtPzks.md

a concise description of various control statements in C++
I didn't know what to add other than this.

src/data/roadmaps/cpp/content/control-flow--statements@s5Gs4yF9TPh-psYmtPzks.md

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-# Control Flow & Statements
+# Control Statements in C++
+
+Control statements direct the flow of your C++ program. Here's a concise overview:
+
+---
+
+## If-Else Statement
+Executes a code block if a condition is true; otherwise, it executes an alternative block.
+```cpp
+if (condition) {
+    // executed when condition is true
+} else {
+    // executed when condition is false
+}
+```
+
+---
+
+## Switch Statement
+Selects and executes a block of code based on the value of an expression.
+```cpp
+switch (expression) {
+    case value1:
+        // executed for value1
+        break;
+    case value2:
+        // executed for value2
+        break;
+    default:
+        // executed if no case matches
+}
+```
+
+---
+
+## Goto Statement
+Unconditionally jumps to a labeled statement within the same function (use sparingly).
+```cpp
+goto label;
+// ...
+label:
+    // code to execute after jump
+```
+
+---
+
+## For Loop
+Repeats a block of code a specific number of times.
+```cpp
+for (initialization; condition; increment) {
+    // repeated code block
+}
+```
+
+---
+
+## While Loop
+Executes a block of code repeatedly as long as a condition remains true.
+```cpp
+while (condition) {
+    // repeated code block
+}
+```
+
+---
+
+## Do-While Loop
+Executes a block of code at least once, then repeats it while the condition remains true.
+```cpp
+do {
+    // code block executed at least once
+} while (condition);
+```
+
+---
+
+These statements form the foundation of controlling program flow in C++.