diff --git a/Caesar-Cipher.c b/Caesar-Cipher.c
new file mode 100644
index 0000000..d272778
--- /dev/null
+++ b/Caesar-Cipher.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include<stdlib.h>
+int main(){
+    int N,K; 
+    scanf("%d",&N);
+    unsigned char* S = (char *)malloc(10240 * sizeof(char)); //malloc () is used for dynamic memory allocation. 
+    scanf("%s",S);
+    scanf("%d",&K);
+    for(int i=0;i<N;i++)
+        {
+        if(S[i] >= 97 && S[i] <= 122) //For small letters
+            {
+            S[i]=S[i]+K; //ASCII value increasing.
+            while(S[i]>122)
+                S[i]=(S[i]%122)+97-1; //after z it will start from a agin.
+            
+            }
+        else if(S[i] >= 65 && S[i] <= 90) //For capital letters
+            {
+            S[i]=S[i]+K;
+            while(S[i]>90)
+                S[i]=(S[i]%90)+65-1;  // after Z it will start from A again.
+            }
+
+            
+        }   printf("%s",S);
+    return 0;
+}