C# 0 The Complete Reference

The Floating-Point Structures

There are two floating-point structures: 

Double

 and 

Single

.

Single

 represents 

float

. Its 

methods are shown in Table 21-3, and its fields are shown in Table 21-4. 

Double

 represents 

double

. Its methods are shown in Table 21-5, and its fields are shown in Table 21-6. As is the 

case with the integer structures, you can specify culture-specific information and format 

information in a call to 

Parse( )

 or 

ToString( )

.

The floating-point structures implement the following interfaces: 

IComparable

,

IComparable

,

IConvertible

,

IFormattable

, and 

IEquatable

, where 

T

 is replaced 

by either 

double

 for 

Double

 or 

float

 for 

Single

.

Method

Meaning

public int CompareTo(object 

v

)

Compares the numerical value of the invoking object 

with that of 

v.

 Returns zero if the values are equal. 

Returns a negative value if the invoking object has a 

lower value. Returns a positive value if the invoking 

object has a greater value.

public int CompareTo(float 

v

)

Compares the numerical value of the invoking object 

with that of 

v.

 Returns zero if the values are equal. 

Returns a negative value if the invoking object has a 

lower value. Returns a positive value if the invoking 

object has a greater value. 

public override bool Equals(object 

v

)

Returns true if the value of the invoking object equals 

the value of 

v.

public bool Equals(float 

v

)

Returns true if the value of the invoking object equals 

the value of 

v.

public override int GetHashCode( )

Returns the hash code for the invoking object.

public TypeCode GetTypeCode( )

Returns the 

TypeCode

 enumeration value for 

Single

,

which is 

TypeCode.Single

.

public static bool IsInfinity(float 

v

)

Returns true if 

v

 represents infinity (either positive or 

negative). Other wise, returns false.

public static bool IsNaN(float 

v

)

Returns true if 

v

 is not a number. Otherwise, returns false.

T

ABLE

 21-3 

Methods Suppor ted by 

Single

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