# Multiply a number with 10 without using multiplication operator

Given a number, the task is to multiply it with 10 without using multiplication operator?

Examples:

```Input : n = 50
Output: 500
// multiplication of 50 with 10 is = 500

Input : n = 16
Output: 160
// multiplication of 16 with 10 is = 160
```

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

A simple solution for this problem is to run a loop and add n with itself 10 times. Here we need to perform 10 operations.
A better solution is to use bit manipulation. We have to multiply n with 10 i.e; n*10, we can write this as n*(2+8) = n*2 + n*8 and since we are not allowed to use multiplication operator we can do this using left shift bitwise operator. So n*10 = n<<1 + n<<3.

## C++

 `// C++ program to multiply a number with 10 using ` `// bitwise operators ` `#include ` `using` `namespace` `std; ` ` `  `// Function to find multiplication of n with ` `// 10 without usng multiplication operator ` `int` `multiplyTen(``int` `n) ` `{ ` `    ``return` `(n<<1) + (n<<3); ` `} ` ` `  `// Driver program to run the case ` `int` `main() ` `{ ` `    ``int` `n = 50; ` `    ``cout << multiplyTen(n); ` `    ``return` `0; ` `} `

## Java

 `// Java Code to Multiply a number with 10 ` `// without using multiplication operator ` `import` `java.util.*; ` ` `  `class` `GFG { ` `     `  `    ``// Function to find multiplication of n  ` `    ``// with 10 without usng multiplication ` `    ``// operator ` `    ``public` `static` `int` `multiplyTen(``int` `n) ` `    ``{ ` `        ``return` `(n << ``1``) + (n << ``3``); ` `    ``} ` `     `  `    ``/* Driver program to test above function */` `    ``public` `static` `void` `main(String[] args)  ` `    ``{ ` `        ``int` `n = ``50``; ` `        ``System.out.println(multiplyTen(n)); ` `        `  `    ``} ` `} ` `   `  `// This code is contributed by Arnav Kr. Mandal. `

## Python 3

 `# Python 3 program to multiply a  ` `# number with 10 using bitwise ` `# operators ` ` `  `# Function to find multiplication ` `# of n with 10 without usng ` `# multiplication operator ` `def` `multiplyTen(n): ` ` `  `    ``return` `(n << ``1``) ``+` `(n << ``3``) ` ` `  `# Driver program to run the case ` `n ``=` `50` `print` `(multiplyTen(n)) ` ` `  `# This code is contributed by  ` `# Smitha `

## C#

 `// C# Code to Multiply a number with 10 ` `// without using multiplication operator ` `using` `System; ` ` `  `class` `GFG { ` `     `  `    ``// Function to find multiplication of n  ` `    ``// with 10 without usng multiplication ` `    ``// operator ` `    ``public` `static` `int` `multiplyTen(``int` `n) ` `    ``{ ` `        ``return` `(n << 1) + (n << 3); ` `    ``} ` `     `  `    ``// Driver Code ` `    ``public` `static` `void` `Main()  ` `    ``{ ` `        ``int` `n = 50; ` `        ``Console.Write(multiplyTen(n)); ` `         `  `    ``} ` `} ` `     `  `// This code is contributed by Nitin Mittal. `

## PHP

 ` `

Output:

```500
```

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