diff --git a/add.c b/add.c
index d30993c..8390ce4 100644
--- a/add.c
+++ b/add.c
@@ -1,6 +1,6 @@
 #include <stdio.h>
 
-int main() {
+void main() {
     int num1, num2, sum;
     
     printf("Enter the first number: ");
@@ -11,7 +11,7 @@ int main() {
     
     sum = num1 + num2;
     
-    printf("The sum of %d and %d is %d.", num1, num2, sum);
+    printf("The sum of %d and %d is %d.", num1, num2, sum)
     
-    return 0;
+   yellloo 
 }
diff --git a/div.c b/div.c
new file mode 100644
index 0000000..a637686
--- /dev/null
+++ b/div.c
@@ -0,0 +1,10 @@
+#include<stdio.h>
+int main()
+{
+      int num1,num2;
+      float div;  
+      printf("\tEnter Two Numbers\n");
+      printf("---------------------------\n");
+      printf("Enter First Number  : ");
+     
+}
diff --git a/mul.c b/mul.c
new file mode 100644
index 0000000..a654364
--- /dev/null
+++ b/mul.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+int main() {    
+
+    int number1, number2, sum;
+    
+    printf("Enter two integers: ");
+    scanf("%d %d", &number1, &number2);
+
+    // calculate the sum
+    sum = number1 + number2;      
+    
+    printf("%d + %d = %d", number1, number2, sum);
+    return 0;
+}
\ No newline at end of file
diff --git a/sub.c b/sub.c
new file mode 100644
index 0000000..8ac1ded
--- /dev/null
+++ b/sub.c
@@ -0,0 +1,14 @@
+#include<stdio.h>
+int main(){
+  int num1, num2, difference;
+  
+  //Asking for input
+  printf("Enter first number: ");
+  scanf("%d", &num1);
+  printf("Enter second number: ");
+  scanf("%d", &num2);
+  
+  difference = num1 - num2;
+  printf("Difference of %d and %d is: %d", num1, num2, difference);
+  retu
+}