Now that we got an idea of how the random number generator function works, let us write a basic program that will generate a random number and print the output. Now let us see how we can write a simple random number generator program. So don’t forget to include this header file in your code. Just keep in mind that both functions are declared in standard library stdlib.h. If it’s a card game then RAND_MAX will be 52 etc. For example, if it’s a dice game then the RAND_MAX will be 6. Based on the need of the application we want to build, the value of RAND_MAX is chosen. Let’s say we need to generate random numbers in the range, 0 to 99, then the value of RAND_MAX will be 100. Here RAND_MAX signifies the maximum possible range of the number.

rand()– To generate the numbers from 0 to RAND_MAX-1 we will use this function.

We will see how the output will be with and without using this function, by writing code in the next section. For example, the first time when you run the code it will generate the output will be like 75, 23, 56, 24, 5, 21, 76, 32, 20 and 37. This unique output makes us rely more on this function. The result will be unique each time execution of the code.

randomize()– This function is responsible for generating a random number every time you run the program.

Let us see what those functions are basically. Using both of them in combination we can get our desired result. Same way, to achieve a random number generation, we have two built-in functions. Instead, we can simply call one of these built-in functions as per our needs. We need not write lengthy logic to get the out. Using these functions we can easily get the required solution. It’s a standard library having many inbuilt functions like EXIT_FAILURE, EXIT_SUCCESS, RAND_MAX, NULL, etc.

We all know that most of the built-in functions are included in the header file of C++. To achieve the generation of random numbers, C++ provides the utilities. Web development, programming languages, Software testing & others How to Generate Random Number?

Generate three random numbers