How to Generate Random Numbers in a Specific Range
In this lesson, we write a C++ program that generates and prints 3 random numbers from 1 to 10.
In this video, you will learn:
• How to use rand() built-in function in C++
• Why we use srand((unsigned)time(NULL)) one time at the beginning of the program
• Why we include cstdlib when working with random numbers
• How to create a GenerateRandomNumber(From, To) function
• How to generate a random number in a specific range
• How the formula Range = To - From + 1 works
• How the formula rand() % Range + From works step by step
• Why modulo gives the remainder only, and why we add From to move the result to our desired range
This lesson is a very important beginner-friendly introduction to random number generation in C++.
If you are learning C++ problem solving step by step, this lesson will help you understand built-in functions, user-defined functions, ranges, and the logic behind generating random numbers correctly.
This is Lesson 18 of Course 4: Problem Solving for Programmers using C++ (Part 2) – Beginner Track.
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