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how to generate Random Numbers in C++

Random numbers are an essential part of many programs, from games and simulations to statistical analysis and cryptography. C++ provides built-in functions and libraries for generating random numbers, making it easy to implement in your code.

In this article, we’ll explore how to use random numbers in C++ and cover the basics of random number generation, including generating random numbers within a specified range and generating random numbers with different distributions.


  1. Generating Random Numbers in C++
  2. Generating Random Numbers in a Specific Range
  3. Generating Random Numbers with Different Distributions
  4. Examples of Using Random Numbers in C++
  5. Frequently Asked Questions (FAQs)

Generating Random Numbers in C++:

C++ provides two main ways to generate random numbers: the rand() function and the C++11 library.

The rand() function is a built-in function that generates a random integer between 0 and RAND_MAX, which is a constant defined in the header. To use the rand() function, you must first seed the random number generator using the srand() function with a value that changes each time the program runs. Here’s an example of how to generate a random number using the rand() function:


int main() {
    // Seed the random number generator with the current time

    // Generate a random number between 0 and RAND_MAX
    int randomNumber = rand();

    // Print the random number