im a little lost on this

[freecody24]

what does this (%) stand for i have 2 different codes with it in there cna u tell me what it means in both codes thanks

//this is my random number gen my teacher showed me but i 
//dont know what the (%) means

int num = rand()%201-100;

and

int main(int argc, char** argv) {

    // Constant variables for change
    const int DOLLAR = 100;
    const int QUARTER = 25;
    const int DIME = 10;
    const int NICKEL = 5;
    const int PENNY = 1;
    
    string input;
    do
    {
    // Change problem
    // User input
    cout << "Enter owed amount: ";
    double owedAmount;
    cin >> owedAmount;
    
    cout << "Enter the tender: ";
    double amountPaid;
    cin >> amountPaid;
    
    double change = amountPaid - owedAmount;
    
    // Convert my change to an integer to use
    // the modulus operator]
    // Add an offset to the change
    int intChange = (change + .005) * 100;
    
    cout << "Your change is: " << intChange << endl;
    
    int numDollars = intChange / DOLLAR;
    
    // Get the remaing amount of change
    intChange %= DOLLAR;
    
    int numQuarters = intChange / QUARTER;
    intChange %= QUARTER;
    
    int numDimes = intChange / DIME;
    intChange %= DIME;
    
    int numNickels = intChange / NICKEL;
    intChange %= NICKEL;
    
    int numPennies = intChange / PENNY;
    intChange %= PENNY;
    
    cout << "Number of dollars: " << numDollars << endl;
    cout << "Number of quarters: " << numQuarters << endl;
    cout << "Number of dimes: " << numDimes << endl;
    cout << "Number of nickels: " << numNickels << endl;
    cout << "Number of pennies: " << numPennies << endl;
    
    cout << "Do you want to enter again?: ";
    cin >> input;
    
    }while(input == "yes");
    
    
    return 0;
}

[shadowCODE]

% means modulo. The remainder after integer division.

e.g
R = remainder

4/4 = 1 R 0 ==> 4%4 = 0;
22/10 = 2 R 2 == > 22%10 = 2;
2/4 = 0 R 2 ==> 2%4 = 2;

get it?

[freecody24]

ya it makes sense thanks for the help shadow

[shadowCODE]

welcome bro