Algorithm

We will be using Standard Library function
Synatax for C++: max({num1,num2,num3}) or max(num1,max(num1,num2))

Code

#include<bits/stdc++.h>
using namespace std;

int main() {
    double num1 = 1, num2 = 3, num3 = 5;
    cout << "The maximum of the three numbers is " << max(num1, max(num2, num3));  //Print max of the three numbers
}
public class Main {
    public static void main(String[] args) {
        double num1 = 1, num2 = 3, num3 = 5;
        double maxNum = Math.max(num1, Math.max(num2, num3));
        System.out.println("The maximum of the three numbers is " + maxNum);  //Print max of the three numbers
    }
}
num1 = 1
num2 = 3
num3 = 5

max_num = max(num1, num2, num3)  #Print max of the three numbers
print(f"The maximum of the three numbers is {max_num}")
let num1 = 1, num2 = 3, num3 = 5;
let maxNum = Math.max(num1, num2, num3);  //Print max of the three numbers
console.log("The maximum of the three numbers is " + maxNum);

Complexity Analysis