What does GetNumericValue do?

getNumericValue(char ch) returns the int value that the specified Unicode character represents. If the character does not have a numeric value, then -1 is returned. If the character has a numeric value that cannot be represented as a nonnegative integer (for example, a fractional value), then -2 is returned.

How to Get numeric value in c#?

GetNumericValue(String, Int32) Method. This method is used to convert the numeric Unicode character at the specified position in a specified string to a double-precision floating point number.

How do you use GetNumericValue?

The getNumericValue(int codePoint) method returns the numeric value of the character, as a non-negative int value. This method will return -2 if the character has a numeric value but the value cannot be represented as a non-negative int value. The method will return -1 if the character has no numeric value..

How to convert char to number c#?

Use ToString to convert a Char object to a String object. This will convert it to an int: char foo = ‘2’; int bar = foo – ‘0’; This works because each character is internally represented by a number.

When to use C in getnumericvalue method?

Converts the specified numeric Unicode character to a double-precision floating point number. The Unicode character to convert. The numeric value of c if that character represents a number; otherwise, -1.0. The following example demonstrates GetNumericValue. The c parameter must be the Char representation of a numeric value.

What is the return type of char.getnumericvalue?

Return Type: If the character is represented by the number, then this method returns a numeric value at position index in str otherwise it returns -1. The return type of this method is System.Double.

How does the getnumericvalue method in Unicode work?

The GetNumericValue method assumes that c corresponds to a single linguistic character and checks whether that character can be converted to a decimal digit. However, some numbers in the Unicode standard are represented by two Char objects that form a surrogate pair.

How to get the numeric value of a character?

Return Value. This method returns the numeric value of the character, as a nonnegative int value; -2 if the character has a numeric value that is not a nonnegative integer; -1 if the character has no numeric value.