F# 中的 for … in expression函数

此循环构造用于迭代可枚举集合(如范围表达式、序列、列表、数组或其他支持枚举的构造)中模式的匹配项。

for … in expression - 语法

for pattern in enumerable-expression do
   body-expression

for … in expression - 示例

// Looping over a list.
let list1=[ 10; 25; 34; 45; 78 ]
for i in list1 do
   printfn "%d" i

// Looping over a sequence.
let seq1=seq { for i in 1 .. 10 -> (i, i*i) }
for (a, asqr) in seq1 do
   printfn "%d squared is %d" a asqr

当您编译并执行程序时，它会生成以下输出-

链接：https://www.learnfk.comhttps://www.learnfk.com/fsharp/fsharp-for-in-loop.html

来源：LearnFk无涯教程网

10
25
34
45
78
1 squared is 1
2 squared is 4
3 squared is 9
4 squared is 16
5 squared is 25
6 squared is 36
7 squared is 49
8 squared is 64
9 squared is 81
10 squared is 100