C++ Syntax

Let's understand the following code:

Code:-

Line 1 :  #include <iostream>
Line 2 :  using namespace std;
Line 3 :  int main() {
Line 4 :     cout << "Hello World!";
Line 5 :     return 0;
Line 6 :  }

Example Explained

Line 1: iostream is standard input output stream. This is a header file that is available in C++ for input output operation.

Line 2: std is the standard namespace. It defines cout, cin and many other things.

Line 3: A special function "main", which denotes the beginning of a program. Code between the {curly braces} will be executed.

Line 4: Cout is a type of object in C++ that is used to print text to the output screen. In our example it will output "Hello World".

Note: Every C++ statement will have a semicolon at the end ';'

Remember: The white space will be ignored by the compiler and multiple white spaces can help you read the code easily.

Line 5:  return represents the end of the function.

Exercise:-

1. return 0 represent?

A. end of the function
B. start of the function
C. It is a header file
D. None of the above

View Answer

2. What will be the output of the following?

cout << "Letsfindcourse!";

A. Letsfindcourse
B. Letsfindcourse!
C. "Letsfindcourse"
D. Letsfindcourse;

View Answer

#include <iostream>
using namespace std;
int main()
{    
int divisor, dividend, quotient, remainder;
cout << "Enter dividend: ";
cin >> dividend;
cout << "Enter divisor: ";
cin >> divisor;
quotient = dividend / divisor;
remainder = dividend % divisor;
cout << "Quotient = " << quotient << endl;
cout << "Remainder = " << remainder;
return 0;
}

Enter dividend: 13
Enter divisor: 4
Quotient = 3
Remainder = 1