Title:- While and do while examples added

docs/day-05/do-while-loop.md

@@ -58,6 +58,65 @@ int main() {
     return 0;
 }
 ```
+### Example 2: Display Even Numbers from 2 to 10
+```cpp
+#include <iostream>
+
+int main() {
+    int i = 2;
+    while (i <= 10) {
+        std::cout << i << std::endl;
+        i += 2;
+    }
+    return 0;
+}
+```
+
+### Example 3: Calculate the Sum of Natural Numbers from 1 to 10
+```cpp
+#include <iostream>
+
+int main() {
+    int i = 1;
+    int sum = 0;
+    while (i <= 10) {
+        sum += i;
+        i++;
+    }
+    std::cout << "Sum = " << sum << std::endl;
+    return 0;
+}
+```
+### Example 4: Check if a Number is Prime
+
+```cpp
+#include <iostream>
+
+int main() {
+    int num;
+    bool isPrime = true;
+    std::cout << "Enter a number: ";
+    std::cin >> num;
+
+    int i = 2;
+    while (i <= num / 2) {
+        if (num % i == 0) {
+            isPrime = false;
+            break;
+        }
+        i++;
+    }
+
+    if (isPrime)
+        std::cout << num << " is a prime number." << std::endl;
+    else
+        std::cout << num << " is not a prime number." << std::endl;
+
+    return 0;
+}
+```
+
+
 
 ## do...while Loop
 
@@ -96,7 +155,7 @@ A `do...while` loop in C++ is similar to a `while` loop, except that the conditi
       +----------------------+
 ```
 
-### Example 2: Display Numbers from 1 to 5
+### Example 5: Display Numbers from 1 to 5
 
 ```cpp
 #include <iostream>
@@ -110,3 +169,101 @@ int main() {
     return 0;
 }
 ```
+
+### Example 6: Display Odd Numbers from 1 to 9
+
+```cpp
+#include <iostream>
+
+int main() {
+    int i = 1;
+    do {
+        std::cout << i << std::endl;
+        i += 2;
+    } while (i < 10);
+    return 0;
+}
+```
+### Example 7: Display Multiplication Table of a Given Number
+
+```cpp
+#include <iostream>
+
+int main() {
+    int num;
+    std::cout << "Enter a number: ";
+    std::cin >> num;
+
+    int i = 1;
+    do {
+        std::cout << num << " * " << i << " = " << num * i << std::endl;
+        i++;
+    } while (i <= 10);
+
+    return 0;
+}
+```
+### Example 8: Sum of Digits of a Number
+
+```cpp
+#include <iostream>
+
+int main() {
+    int num, sum = 0;
+    std::cout << "Enter a number: ";
+    std::cin >> num;
+
+    do {
+        sum += num % 10;
+        num /= 10;
+    } while (num != 0);
+
+    std::cout << "Sum of digits = " << sum << std::endl;
+
+    return 0;
+}
+```
+### Example 9: Reverse a Number
+```cpp
+#include <iostream>
+
+int main() {
+    int num, reversed = 0;
+    std::cout << "Enter a number: ";
+    std::cin >> num;
+
+    do {
+        int digit = num % 10;
+        reversed = reversed * 10 + digit;
+        num /= 10;
+    } while (num != 0);
+
+    std::cout << "Reversed number = " << reversed << std::endl;
+
+    return 0;
+}
+```
+
+### Example 10: Find the Greatest Common Divisor (GCD) of Two Numbers
+
+```cpp
+#include <iostream>
+
+int main() {
+    int a, b;
+    std::cout << "Enter two numbers: ";
+    std::cin >> a >> b;
+
+    do {
+        if (a > b)
+            a -= b;
+        else
+            b -= a;
+    } while (a != b);
+
+    std::cout << "GCD = " << a << std::endl;
+
+    return 0;
+}
+```
+