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Answer 
Cout is used to print the content. Output key word
Example program
#include <iostream>
using namespace std;
int main() {
int a,b,c;
cout<<"Enter a value";
cin>>a;
cout<<"Enter b value";
cin>>b;
c=a+b;
cout<<c;
return 0;
}
cout in C++It is defined in iostream header file. It is used to display the output to the standard output device i.e. monitor. It is associated with the standard C output stream stdout. The data needed to be displayed on the screen is inserted in the standard output stream (cout) using the insertion operator(<<).
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What is the main difference between returning value of a function and does not return any value of a function in C. Which is correct void main(void), int main(void), int main(int) , or void main(int) and explain the main difference between int main() and int main(void).
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