Fsharp-comparison-operators

F＃-比較演算子

次の表は、F＃言語でサポートされているすべての比較演算子を示しています。 これらのバイナリ比較演算子は、整数型および浮動小数点型で使用できます。 これらの演算子は、bool型の値を返します。

変数Aが10を保持し、変数Bが20を保持すると仮定します-

Operator	Description	Example
=	Checks if the values of two operands are equal or not, if yes then condition becomes true.	(A == B) is not true.
<>	Checks if the values of two operands are equal or not, if values are not equal then condition becomes true.	(A <> B) is true.
>	Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.	(A > B) is not true.
<	Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true.	(A < B) is true.
>=	Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true.	(A >= B) is not true.
⇐	Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.	(A ⇐ B) is true.

例

let mutable a : int32 = 21
let mutable b : int32 = 10

if (a = b) then
   printfn "Line 1 - a is equal to b"
else
   printfn "Line 1 - a is not equal to b"

if (a < b) then
   printfn "Line 2 - a is less than b"
else
   printfn "Line 2 - a is not less than b"

if (a > b) then
   printfn "Line 3 - a is greater than b"
else
   printfn "Line 3 - a is not greater than b"

( *Lets change value of a and b* )
a <- 5
b <- 20

if (a <= b) then
   printfn "Line 4 - a is either less than or equal to b"
else
   printfn "Line4 - a is a is greater than b"

あなたがプログラムをコンパイルして実行すると、次の出力が得られます-

Line 1 - a is not equal to b
Line 2 - a is not less than b
Line 3 - a is greater than b
Line 4 - a is either less than or equal to b