Generate random number between 1 to 100 in C++

In this tutorial, we will see how to generate a random number between 1 to 100 in C++.

rand( ) function in C++

It’s an inbuilt function in c++, which returns a random number between 0 and RAND_MAX.
If we use rand( )%n, it returns a random number 0 to n-1 (both inclusive).
Now here we want a random number between 1 and 100, we will use 1 + rand( )%100.

C++ Code: Generate random number between 1 to 100

#include <bits/stdc++.h>

using namespace std;

int main(){
    cout << "A random number between 1 and 100: " << 1 + (rand() % 100) << endl;
}

Output

A random number between 1 and 100: 100

 

srand( ) function

This is used to set the starting point with seed for producing the pseudo-random numbers. If you want a different random number each time, paste “srand(time(0));” in the code. And don’t forget to import “#include <time.h>” header.

Output 1

A random number between 1 and 100: 3

Output 2

A random number between 1 and 100: 26

Also read: Pick a random element from an array in C++