Parameters

s

A string.

index

A int that specifies the position of a character in s.

index

Documentation for this section has not yet been entered.

Returns

A double representing the numeric value associated with the char at position index in s if and only if that char has an associated numeric value; otherwise, -1.0.

Exceptions

Type	Reason
ArgumentNullException	s is a null reference.
ArgumentOutOfRangeException	The value of index is less than zero, or greater than or equal to the length of s.

Remarks

A character has an associated numeric value if and only if it is a member of one of the following categories in System.Globalization.UnicodeCategory: System.Globalization.UnicodeCategory.DecimalDigitNumber, System.Globalization.UnicodeCategory.LetterNumber, or System.Globalization.UnicodeCategory.OtherNumber .

Requirements

Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0