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created a program to find lcm of number #91

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created a program to find lcm of number #91

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26 changes: 26 additions & 0 deletions c++/lcm.cpp
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// C++ program to find LCM of two numbers
#include <iostream>
using namespace std;

// Recursive function to return gcd of a and b
long long gcd(long long int a, long long int b)
{
if (b == 0)
return a;
return gcd(b, a % b);
}

// Function to return LCM of two numbers
long long lcm(int a, int b)
{
return (a / gcd(a, b)) * b;
}

// Driver program to test above function
int main()
{
int a = 15, b = 20;
cout <<"LCM of " << a << " and "
<< b << " is " << lcm(a, b);
return 0;
}