What does num mean in c++

num is a built-in global variable in C, used to read and write numbers in the stream. Numbers are input through the extraction operator (>>) and the insertion operator (<<) outputs the number.

#What does num mean in C?

num is a built-in global variable in C that is used to read and write numbers from a stream. It represents the next input or output number in the C stream.

How to use num?

You can use num in the following ways:

• Enter a number: To read a number from a stream, you can use the extraction operator>> ;(for example, cin >> num).

• Output numbers: To write numbers to a stream, you can use the insertion operator << (for example, cout << num).

Example:

<code class="cpp">#include <iostream>

using namespace std;

int main() {
  int num;
  cout << "Enter a number: ";
  cin >> num;  // Reads a number from the standard input stream
  cout << "The number you entered is: " << num << endl;  // Writes the number to the standard output stream
  return 0;
}</code>

In this example, the global variable num is used to read an integer from the standard input stream and output it to the standard output flow.

Note:

• num is not a function or class, but a built-in global variable.
• num can only be used to input or output numbers (integers or floating point numbers).
• num works with other stream operations in the C library, such as the insertion operator << and the extraction operator >>.

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