Golang | Hexadecimal: In this tutorial, we are going to learn about the hexadecimal literals, how to use hexadecimal values in Go Language?
Submitted by IncludeHelp, on April 07, 2021

Hexadecimal (Hex) is a number system with base 16, it has 16 values (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A/a, B/b, C/c, D/d, E/e, and F/f).

In Go programming language, a hexadecimal literal can be written with a prefix 0x or 0X (Zero and X alphabet either in Uppercase or Lowercase). The value which is prefixed with 0x or 0X is considered as a hexadecimal value and it can be used in the program statements like a Hex value can be assigned to a variable or constant, can be used within an expression, can be assigned in an array, etc.

Examples:

```0x123AF
0X123AF
0X345
0X AFC
0X00
0XFF
0XFFFFE
```

Assigning a hexadecimal value to a variable & constant

In the below example, we are creating a variable and a constant, and assigning hexadecimal values to them.

Example of assigning hexadecimal values to a variable & a constant

```// Golang program to demonstrate the example of
// a variable & a constant

package main

import (
"fmt"
)

func main() {
// variable
var a int = 0x123AF
// constant
const b int = 0xFF

// printing the values
fmt.Println("a = ", a)
fmt.Println("b = ", b)

// printing values in the hexadecimal format
fmt.Printf("a = %X\n", a)
fmt.Printf("b = %X\n", b)
}
```

Output:

```a =  74671
b =  255
a = 123AF
b = FF
```

Using a hexadecimal value in an expression

A hexadecimal value can also be used within an expression. In the below program, we are declaring two variables, assigning them with hexadecimal values, and finding their sum with a hexadecimal value 0xFF which is equivalent to 255.

Example of using hexadecimal values in an expression

```// Golang program to demonstrate the example of
// Example of using hexadecimal values
// in an expression

package main

import (
"fmt"
)

func main() {
// variables
a := 0x10
b := 0x20

// calculating the sum of a, b and 0xFF
c := a + b + 0xFF
// printing the values
fmt.Println("a = ", a)
fmt.Println("b = ", b)
fmt.Println("c = ", c)

// printing values in the hexadecimal format
fmt.Printf("a = %X\n", a)
fmt.Printf("b = %X\n", b)
fmt.Printf("c = %X\n", c)
}
```

Output:

```a =  16
b =  32
c =  303
a = 10
b = 20
c = 12F
```

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