What is the maximum number of digits that an integer variable can contain?

In C#, the int type is a 32-bit signed integer that can store values from -2,147,483,648 to 2,147,483,647. The maximum number of digits in the decimal representation of the maximum int value is 10 digits (for example, 2147483647). If higher precision is needed, you can use long (64-bit) or BigInteger for arbitrary length.