# BigInteger.Subtract(BigInteger, BigInteger) メソッド

## 定義

ある BigInteger 値を別の値から減算し、その結果を返します。Subtracts one BigInteger value from another and returns the result.

``````public:
static System::Numerics::BigInteger Subtract(System::Numerics::BigInteger left, System::Numerics::BigInteger right);``````
``public static System.Numerics.BigInteger Subtract (System.Numerics.BigInteger left, System.Numerics.BigInteger right);``
``static member Subtract : System.Numerics.BigInteger * System.Numerics.BigInteger -> System.Numerics.BigInteger``
``Public Shared Function Subtract (left As BigInteger, right As BigInteger) As BigInteger``

left
BigInteger

right
BigInteger

#### 戻り値

`right` から `left` を減算した結果。The result of subtracting `right` from `left`.

## 注釈

カスタム演算子をサポートしない言語では、Subtract メソッドを使用して BigInteger 値を使用して減算を実行できます。Languages that do not support custom operators can use the Subtract method to perform subtraction using BigInteger values.

Subtract メソッドは、次の例に示すように、減算の結果と異なる値を割り当てることによって BigInteger 変数をインスタンス化するときに、減算演算子の代替として便利です。The Subtract method is a useful substitute for the subtraction operator when instantiating a BigInteger variable by assigning it the difference that results from subtraction, as shown in the following example.

``````// The statement
//    BigInteger number = Int64.MinValue - Int64.MaxValue;
// produces compiler error CS0220: The operation overflows at compile time in checked mode.
// The alternative:
BigInteger number = BigInteger.Subtract(Int64.MinValue, Int64.MaxValue);
``````
``````' The statement
'    Dim number As BigInteger = Int64.MinValue - Int64.MaxValue
' produces compiler error BC30439: Constant expression not representable in type 'Long'.
' The alternative:
Dim number As BigInteger = BigInteger.Subtract(Int64.MinValue, Int64.MaxValue)
``````