I study functions, wrote a simple script for the textbook, and there were 2 errors.
package main
import "fmt"
func zero(x int) {
x = 0
return x
}
func main() {
x := 5
x = zero(x)
fmt.Println(x)
}
too many arguments to return (string return x)
How is "too many"? It's only one!
zero(x) used as value (string x = zero(x))
I don't understand what he says to me.
int in func
package main
import "fmt"
func zero(x int) int {
x = 0
return x
}
func main() {
x := 5
x = zero(x)
fmt.Println(x)
}
package main
import "fmt"
func zero(x int) int {
x = 0
return x
}
func main() {
x := 5
x = zero(x)
fmt.Println(x)
}
I believe this is closer to the original idea...
package main
import "fmt"
func zero(x *int) {
*x = 0
return
}
func main() {
x := 5
zero(&x)
fmt.Println(x)
}
too many means that your function is returning more values that the function signature specifies.
In your case, your function signature func zero(x *int), says that this function doesn't returns ANY params, and inside the function body, you're returning ONE value: return x. So 1 is too many for 0 expected. Exactly 1 more.
Then zero(x) used as value is telling you that you're calling a function that doesn't return ANY value, and you're trying to assign the non-existent return value to a variable: x = zero(x).
That's why the compiler tells you about using zero(x) as a value