9. Data segment

Initialized data segment (or simply the data segment), contains variables that

• (a) are specifically initialized in the program.

• (b) declared outside any function

For example,

    #include <iostream>
    double Pi = 3.1415926;
    int main()
    {
      std::cout << "Pi equals " << Pi << '\n';
      return 0;
    }

Variables declared outside any function are called global variables.

Pi demonstrates an initialized global variable.