diff --git a/Recursion/gcd.c b/Recursion/gcd.c
index 054f16a..5afca3d 100644
--- a/Recursion/gcd.c
+++ b/Recursion/gcd.c
@@ -1,5 +1,5 @@
 #include<stdio.h>
-int gcd(int,int);
+int gcd(int,int);   //function declaration
 int min;
 main()
 {
@@ -9,9 +9,9 @@ main()
     printf("Enter the value of y:\n");
     scanf("%d",&y);
     min=x>y?y:x;
-    printf("The GCD of %d and %d is %d.\n",x,y,gcd(x,y));
+    printf("The GCD of %d and %d is %d.\n",x,y,gcd(x,y));   //function call
 }
-int gcd(int a,int b)
+int gcd(int a,int b)    //function definition
 {
     if(a%min==0&&b%min==0)
     {