Q. Write An Algorithm And Program To Find Greatest of Three Numbers.

Here you will find an algorithm and program to find greatest of three numbers. Given three numbers and our task is to find the largest number among the three numbers.

Now let us understand what logic we need to use in this -
In the program three integer numbers are given num1, num2, num3, it would use "if condition" and will compare and display the greatest number as output.

For Example :-

Input : num1 = 2, num2 = 8, num3 = 1
Output : Largest number = 8
Explanation : As we can see that there are three integer number : num1 = 2, num2 = 8, num3 = 1. Output is the largest number amoung the three number i.e. Largest number = 8

Algorithm To Find Greatest of Three Numbers.

\\Algorithm To Find the Largest Number Among Three Numbers.
START
Step 1: [ Take Input ] Read: Number Num1, Num2, Num3
Step 2: If Num1 > Num2.
If true, then check if Num1 > Num3.
If true, print 'Num1' as the greatest number.
If false, print 'Num3' as the greatest number.
If false, then check if Num2 > Num3.
If true, print 'Num2' as the greatest number.
If false, print 'Num3' as the greatest number.
END

Program To Find Greatest of Three Numbers

C++

Java

Python

PHP

//C Program To Find the Largest Number Among Three Numbers
#include <stdio.h> 
int main() 
{ 
//initializing numbers to compare 
int Num1=10, Num2=15, Num3=-10; 
printf("The Three Number are Num1 = %d, Num2 = %d, Num3 = %d \n", Num1, Num2, Num3); 
//comparing numbers, Num1 with Num2 and Num1 with Num3   
//if both conditions are true, prints Num1  
if (Num1 >= Num2 && Num1 >= Num3) 
printf("Largest number: %d", Num1); 
//comparing Num2 with Num1 and Num2 with Num3  
//if both conditions are true, prints Num2 
if (Num2 >= Num1 && Num2 >= Num3) 
printf("Largest number: %d", Num2); 
//comparing Num3 with Num1 and Num3 with Num2 
//if both conditions are true, prints Num3  
if (Num3 >= Num1 && Num3 >= Num2) 
printf("Largest number: %d", Num3); 
return 0; 
}

//C++ Program To Find the Largest Number Among Three Numbers
#include <iostream>
using namespace std;
int main() {   
//initializing numbers to compare 
int Num1 = 10, Num2 = 15, Num3 = -10;
cout <<"The Three Number are Num1 = "<<Num1 <<", Num2 = "<<Num2<<", Num3 = "<<Num3<<"\n";
//comparing numbers, Num1 with Num2 and Num1 with Num3   
//if both conditions are true, prints Num1
if(Num1 >= Num2 && Num1 >= Num3)
cout << "Largest number: " << Num1;
//comparing Num2 with Num1 and Num2 with Num3  
//if both conditions are true, prints Num2 
if(Num2 >= Num1 && Num2 >= Num3)
cout << "Largest number: " << Num2;
//comparing Num3 with Num1 and Num3 with Num2 
//if both conditions are true, prints Num3
if(Num3 >= Num1 && Num3 >= Num2)
cout << "Largest number: " << Num3;
return 0;
}

//Java Program To Find the Largest Number Among Three Numbers
import java.util.Scanner;
public class LFC
{
public static void main (String[]args)
{
//initializing numbers to compare  
int Num1 = 10, Num2 = 15, Num3 = -10;
System.out.println ("The Three Numbers are Num1 = "+Num1+", Num2 = "+Num2+", Num3 = "+Num3);
//comparing numbers, Num1 with Num2 and Num1 with Num3   
//if both conditions are true, prints Num1  
if (Num1 >= Num2 && Num1 >= Num3)
System.out.println ("Largest Number: "+Num1);
//comparing Num2 with Num1 and Num2 with Num3  
//if both conditions are true, prints Num2  
else if (Num2 >= Num1 && Num2 >= Num3)
System.out.println ("Largest Number: "+Num2);
else
//prints Num3 if the above conditions are false  
System.out.println ("Largest number: "+Num3);
}
}

#Python Program To Find the Largest Number Among Three Numbers
# initializing numbers to compare 
Num1 = 10
Num2 = 15
Num3 = -10
#comparing numbers, Num1 with Num2 and Num1 with Num3 
if (Num1 >= Num2) and (Num1 >= Num3):
largest = Num1
#comparing numbers, Num2 with Num1 and Num2 with Num3 
elif (Num2 >= Num1) and (Num2 >= Num3):
largest = Num2
#comparing numbers, Num3 with Num1 and Num3 with Num2
else:
largest = Num3
print("Largest number: ", largest)

//C# Program To Find the Largest Number Among Three Numbers
using System;
class LFC {
static void Main() {
//initializing numbers to compare 
int Num1 = 10, Num2 = 15, Num3 = -10;
//comparing numbers, Num1 with Num2 and Num1 with Num3   
//if both conditions are true, prints Num1
if(Num1 >= Num2 && Num1 >= Num3)
Console.Write("Largest Number : "+Num1);
//comparing Num2 with Num1 and Num2 with Num3  
//if both conditions are true, prints Num2 
if(Num2 >= Num1 && Num2 >= Num3)
Console.Write("Largest Number : "+Num2);
//comparing Num3 with Num1 and Num3 with Num2 
//if both conditions are true, prints Num3
if(Num3 >= Num1 && Num3 >= Num2)
Console.Write("Largest Number : "+Num3);
}
}

//PHP Program To Find the Largest Number Among Three Numbers
//initializing numbers to compare 
$Num1 = 40;
$Num2 = 25;
$Num3 = 7;
echo "The three numbers are Num1 = $Num1, Num2 = $Num2, Num3 = $Num3 
";
//comparing numbers, Num1 with Num2 and Num1 with Num3   
//if both conditions are true, prints Num1
if(($Num1 > $Num2) && ($Num1 > $Num3)) 
echo "Largest Number: $Num1";
//comparing numbers, Num2 with Num3   
else if($Num2 > $Num3) 
echo "Largest Number: $Num2";
else
echo "Largest Number: $Num3";

\\C Program To Find the Largest Number Among Three Numbers
#include <stdio.h> 
int main() 
{ 
//initializing numbers to compare 
int Num1=10, Num2=15, Num3=-10; 
printf("The Three Number are Num1 = %d, Num2 = %d, Num3 = %d \n", Num1, Num2, Num3); 
//comparing numbers, Num1 with Num2 and Num1 with Num3   
//if both conditions are true, prints Num1  
if (Num1 >= Num2 && Num1 >= Num3) 
printf("Largest number: %d", Num1); 
//comparing Num2 with Num1 and Num2 with Num3  
//if both conditions are true, prints Num2 
if (Num2 >= Num1 && Num2 >= Num3) 
printf("Largest number: %d", Num2); 
//comparing Num3 with Num1 and Num3 with Num2 
//if both conditions are true, prints Num3  
if (Num3 >= Num1 && Num3 >= Num2) 
printf("Largest number: %d", Num3); 
return 0; 
}

Output

The Three Number are Num1 = 10, Num2 = 15, Num3 = -10
Largest number: 15

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