diff --git a/CPP/CPP_greatest.cpp b/CPP/CPP_greatest.cpp
index e184d41..23205f8 100644
--- a/CPP/CPP_greatest.cpp
+++ b/CPP/CPP_greatest.cpp
@@ -1,13 +1,15 @@
-
+//header file
 #include<iostream>
 using namespace std;
 int main() 
 {
+//initialising variable
 int a, b, c;
 cout <<"Enter any three numbers: ";
 cin>>a;
 cin>>b;
 cin>>c;
+//main coding part
 if(a>=b && a>=c) 
 {
 cout<<"Largest number: "<<a;