Generate random numbers

Random numbers are always only pseudo-random numbers and are generated with a mathematical formula from the predecessor.

A random number can be generated by calling the rand() function. The function returns a different number each time it is called. The range of values in which the random number should be located can be specified.

#include <iostream>
using namespace std;

int main() {
    // initialize random seed
    srand (time(NULL));

    cout << "Random value between 0 - 9:\t";
    int randomInteger10 = rand() % 10 + 1;
    cout << randomInteger10 << endl;

    cout << "Random value between 0 - 99:\t";
    int randomInteger100 = rand() % 100;
    cout << randomInteger100 << endl;

    cout << "Random value between 1 - 100:\t";
    int randomInteger = rand() % 100 + 1;
    cout << randomInteger << endl;

    return 0;
}

Output first run

Random value between 0 - 9:	8
Random value between 0 - 99:	49
Random value between 1 - 100:	74

Output second run

Random value between 0 - 9:	1
Random value between 0 - 99:	66
Random value between 1 - 100:	92