64 bit unsigned integer c++

To declare a 64-bit unsigned integer in C++, you can use the uint64_t data type. Here are the steps to declare and use a 64-bit unsigned integer in C++:

  1. Include the <cstdint> header file at the beginning of your code. This header file provides the uint64_t data type.

  2. Declare a variable of type uint64_t using the desired name. For example, you can declare a variable called myNumber as a 64-bit unsigned integer like this: 

uint64_t myNumber;
  1. Initialize the variable with a value if needed. For example, you can assign a value of 100 to myNumber like this:
myNumber = 100;
  1. Use the variable in your code as required. For example, you can print the value of myNumber using the std::cout statement like this:
std::cout << "The value of myNumber is: " << myNumber << std::endl;

Make sure to include the <iostream> header file at the beginning of your code to use the std::cout statement.

That's it! You have successfully declared and used a 64-bit unsigned integer in C++. Let me know if you have any further questions.