In this program, we are going to find the largest number among three numbers, similar to the previous one, but it is nested if-else version.

Logic

Let three variables be: A = 400, B = 200 and C = 300

The logic goes like this:

  1. if A >= B then check for if A >= C, then print A else print C.
  2. else part: if B >= C then print B else print C.

See the below-shown flow diagram to better understand.

Program

NestedIfElseStatement.CPPCopy
#include <iostream>

using namespace std;

int main() {

    float num1, num2, num3;

    cout << "Enter 1st number : ";
    cin >> num1;

    cout << endl << "Enter 2nd number : ";
    cin >> num2;

    cout << endl << "Enter 3rd number : ";
    cin >> num3;

    if(num1 >= num2) {

        if(num1 >= num3) {
            cout << endl << num1 << " is largest number";
        } else {
            cout << endl << num3 << " is largest number";
        }
        
    } else {

        if(num2 >= num3) {
            cout << endl << num2 << " is largest number";
        } else {
            cout << endl << num3 << " is largest number";
        }

    }

    return 0;
}
Try It

Output

Enter 1st number : 100
Enter 2nd number : 10
Enter 3rd number : 99
100 is largest number