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This program didn't show output why? It is the saved one
#include <iostream> using namespace std; int main() { /* Comment out printing of Hello world! cout << "Hello world!"; // prints Hello world! */ return 0; }
6 Respuestas
+ 1
I just copied it from code playground 
And when I clicked run 
It didn't show output
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Remove the comments and you will get the output. 
#include<iostream>
using namespace std;
int main() 
{
   cout <<" Hello world";
   return 0;
}
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Bt it was the chapter of comment bro
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Then try this..... 
#include<iostream>
using namespace std;
int main() 
{
/* Comment out printing of Hello world */
cout <<" Hello world";//prints hello
   return 0;
}
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Anything written within (/*    */) without bracket is treated as comments which means it should not be executed
For single line comment we use double slash //
For multiple lines we use /* at beginning and */ at the end



