Each variable in Go has a type and Go will not let you mix values and variables of different types. When we created the variable with the := operator Go automatically deducted the type from the assigned value. In this case it was string.

package main

import (
    "fmt"
)

func main() {
    name := "Foo"
    fmt.Println(name)
    name = 42
}

# command-line-arguments
./variable.go:8:7: cannot use 42 (type int) as type string in assignment