I'm trying to check if my integer or float value is empty. But type error is thrown.
Tried:
if foo == nil
//Error: cannot convert nil to type float32
//all other methods I Tried also throw type errors too
I'm trying to check if my integer or float value is empty. But type error is thrown.
Tried:
if foo == nil
//Error: cannot convert nil to type float32
//all other methods I Tried also throw type errors too
The zero values for integer and floats is 0. nil
is not a valid integer or float value.
A pointer to an integer or a float can be nil
, but not its value.
This means you either check for the zero value:
if foo == 0 {
// it's a zero value
}
Or you deal with pointers:
package main
import (
"fmt"
)
func main() {
var intPointer *int
// To set the value use:
// intValue := 3
// intPointer = &intValue
if intPointer == nil {
fmt.Println("The variable is nil")
} else {
fmt.Printf("The variable is set to %v\n", *intPointer)
}
}
*
: play.golang.org/p/9TrwjUkr4I –
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