func rec(i int) {
在go语言里，参数的名称写在类型的前面
22 for index,value :=range arg {
23 println(index,value);
24 }
23 println(index,value);
24 }
[] int ＝>slice
[5] int => array
new returns a pointer.
make returns initialized (non zero) values.
make creates slices, maps, and channels only, and it returns an initialized (not zero)
value of type T, not *T.
value of type T, not *T.
无名函数的定义：
defer func(x int) {
/* ... */
}(5) ← Give the input variable x the value 5
/* ... */
}(5) ← Give the input variable x the value 5
defer func() {
/* ... */}() ← ()is needed here
func main() {
a := func() { ← Define a nameless function and assign to a
println("Hello")
} ← No () here
a() ← Call the function
}
a := func() { ← Define a nameless function and assign to a
println("Hello")
} ← No () here
a() ← Call the function
}
常量：
3 const(
4 _ =100*iota
5 ADD ← Implicitly ADD = 100*iota
6 SUB
7 MUL
8 DIV
9 MAXPOS = 11
10 )
ADD＝100，SUB＝200，MUL＝300，DIV＝400 4 _ =100*iota
5 ADD ← Implicitly ADD = 100*iota
6 SUB
7 MUL
8 DIV
9 MAXPOS = 11
10 )
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