Related Articles
Increment a number without using ++ or +
• Difficulty Level : Hard
• Last Updated : 28 Sep, 2018

The task is to Increment a number without using ++ and + operators.

Examples:

```Input : 3
Output : 4

Input : 9
Output : 10
```

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

The idea is based on the fact that the negative numbers are stored using 2’s complement form. 2’s complement form is obtained by inverting bits and then adding one. So if we invert all bits of given number and apply negative sign, we get the number plus 1.

## C++

 `// CPP program to increment an unsigned ` `// int using bitwise operators. ` `#include ` `using` `namespace` `std; ` ` `  `// function that increment the value. ` `int` `increment(unsigned ``int` `i) ` `{ ` `    ``// Invert bits and apply negative sign ` `    ``i = -(~i); ` ` `  `    ``return` `i; ` `} ` ` `  `// Driver code ` `int` `main() ` `{ ` `    ``int` `n = 3; ` `    ``cout << increment(n); ` `    ``return` `0; ` `} `

## Java

 `// Java program to increment  ` `// an unsigned int using ` `// bitwise operators. ` `import` `java.io.*; ` ` `  `class` `GFG ` `{ ` `     `  `// function that increment ` `// the value. ` `static` `long` `increment(``long` `i) ` `{ ` `    ``// Invert bits and  ` `    ``// apply negative sign ` `    ``i = -(~i); ` ` `  `    ``return` `i; ` `} ` ` `  `// Driver code ` `public` `static` `void` `main (String[] args)  ` `{ ` `    ``long` `n = ``3``; ` `    ``System.out.print( increment(n)); ` `} ` `} ` ` `  `// This code is contributed ` `// by inder_verma. `

## Python3

 `# Python3 program to increment  ` `# an unsigned int using  ` `# bitwise operators. ` ` `  `# function that increment the value. ` `def` `increment(i): ` `    ``# Invert bits and  ` `    ``# apply negative sign ` `    ``i ``=` `-``(~i); ` ` `  `    ``return` `i; ` ` `  `# Driver code ` `if` `__name__ ``=``=` `"__main__"``: ` `    ``n ``=` `3``; ` `    ``print``(increment(n)); ` ` `  `# This code is contributed by mits `

## C#

 `// C# program to increment  ` `// an unsigned int using ` `// bitwise operators. ` `using` `System; ` ` `  `class` `GFG ` `{ ` `     `  `// function that increment ` `// the value. ` `static` `long` `increment(``long` `i) ` `{ ` `    ``// Invert bits and  ` `    ``// apply negative sign ` `    ``i = -(~i); ` ` `  `    ``return` `i; ` `} ` ` `  `// Driver code ` `public` `static` `void` `Main ()  ` `{ ` `    ``long` `n = 3; ` `    ``Console.WriteLine(increment(n)); ` `} ` `} ` ` `  `// This code is contributed ` `// by inder_verma. `

## PHP

 ` `

Output:

```4
```

It also works for characters.
Example:

```Input : a
Output : b

Input : o
Output : p
```

## C++

 `// CPP program to increment an unsigned ` `// char using bitwise operators. ` `#include ` `using` `namespace` `std; ` ` `  `// function that increment the value. ` `char` `increment(unsigned ``char` `i) ` `{ ` ` `  `    ``// Invert bits and apply negative sign ` `    ``i = -(~i); ` `    ``return` `i; ` `} ` ` `  `// Driver code ` `int` `main() ` `{ ` `    ``char` `n = ``'a'``; ` `    ``cout << increment(n); ` `    ``return` `0; ` `} `

## Java

 `// Java program to increment  ` `// an unsigned char using  ` `// bitwise operators. ` `class` `GFG ` `{ ` `// function that increment the value. ` `static` `char` `increment(``char` `i) ` `{ ` ` `  `    ``// Invert bits and apply ` `    ``// negative sign ` `    ``int` `i1 = -(~(``int``)(i)); ` `    ``return` `(``char``)(i1); ` `} ` ` `  `// Driver code ` `public` `static` `void` `main(String[] args) ` `{ ` `    ``char` `n = ``'a'``; ` `    ``System.out.println(increment(n)); ` `} ` `} ` ` `  `// This code is contributed by mits  `

## Python3

 `# Python3 program to increment  ` `# an unsigned char using ` `# bitwise operators. ` ` `  `# function that increment ` `# the value. ` `def` `increment(i): ` ` `  `    ``# Invert bits and ` `    ``# apply negative sign ` `    ``i ``=` `-``(~``ord``(i)); ` `    ``return` `chr``(i); ` ` `  `# Driver code ` `n ``=` `'a'``; ` `print``(increment(n)); ` `     `  `# This code is contributed by mits  `

## C#

 `// C# program to increment  ` `// an unsigned char using  ` `// bitwise operators. ` `class` `GFG ` `{ ` `// function that increment the value. ` `static` `char` `increment(``char` `i) ` `{ ` ` `  `    ``// Invert bits and apply ` `    ``// negative sign ` `    ``int` `i1 = -(~(``int``)(i)); ` `    ``return` `(``char``)(i1); ` `} ` ` `  `// Driver code ` `static` `void` `Main() ` `{ ` `    ``char` `n = ``'a'``; ` `    ``System.Console.WriteLine(increment(n)); ` `} ` `} ` ` `  `// This code is contributed by mits  `

## PHP

 ` `

Output:

```b
```

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up
Recommended Articles
Page :