How Can I Easily Convert a Character Digit to an Integer in C#?

Character to integer conversion in C#: simplified method

Converting characters to integers can be a challenge in C#. Although the Convert.ToInt32() function seems like an obvious choice, it usually returns the decimal Unicode value of the character rather than the numeric equivalent.

For example, trying to convert the character '2' using Convert.ToInt32() results in a decimal value of 50, which is not the expected number representation. To solve this problem, a more straightforward solution exists.

You can directly subtract the character '0' from the target character to get the corresponding integer value. This is because the characters '0' to '9' have consecutive numerical values ​​in their internal representation.

Consider the following code snippet:

<code class="language-csharp">char foo = '2';
int bar = foo - '0';</code>

In this case, the value of 'bar' will be 2 because it subtracts the numeric representation of '0' (48) from the numeric representation of '2' (50).

This method provides a convenient and efficient way to convert characters to integers without the need for intermediate string conversions or the use of external libraries.

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