# Convert a hexadecimal value to decimal in C#

C# program to change over a hexadecimal value to decimal: Here, we will figure out how to change over a given hex value to the decimal value?

Given an integer in the hexadecimal arrangement, we need to change over it into a decimal organization in C#.

To change over a hexadecimal value to the decimal value, we use Convert.ToInt32() work by determining the base on given number organization, its syntax is:

``integer_value = Convert.ToInt32(variable_name, 16); ``

Here,

• variable_name is a variable that contains the hexadecimal value (we can likewise give the hex value).
• 16 is the base of the hexadecimal value.

### Example:

``````    Input:
hex_value = "10FA"

Output:
int_value = 4346``````

## C# code to change over hexadecimal to decimal

``````using System;
using System.Text;

namespace Test
{
class Program
{
static void Main(string[] args)
{
//declaring a variable and assigning hex value
string hex_value = "10FA";

//converting hex to integer
int int_value = Convert.ToInt32(hex_value, 16);

//printing the values
Console.WriteLine("hex_value = {0}", hex_value);
Console.WriteLine("int_value = {0}", int_value);

//hit ENTER to exit
}
}
}``````

## Output

``````hex_value = 10FA
int_value = 4346``````

## Testing with invalid hexadecimal value

As we realize that a hex value contains digits from 0 to 9, A to F and a to f, if there is an invalid character, the change won’t happen and a mistake will be tossed.

In the given example, there is an invalid character ‘T‘ in the hex_value, in this way, the program will toss a blunder.

``````using System;
using System.Text;

namespace Test
{
class Program
{
static void Main(string[] args)
{
try
{
//declaring a variable and assigning hex value
string hex_value = "10FAT";

//converting hex to integer
int int_value = Convert.ToInt32(hex_value, 16);

//printing the values
Console.WriteLine("hex_value = {0}", hex_value);
Console.WriteLine("int_value = {0}", int_value);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}

//hit ENTER to exit
``````System.FormatException: Additional non-parsable characters are