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You can convert numbers to strings by using the strconv. Itoa method from the strconv package in the Go standard libary. If you pass either a number or a variable into the parentheses of the method, that numeric value will be converted into a string value.
bool values are convertible to int type, with true converting to 1 and false converting to 0 . This is guaranteed by the language.
Boolean values are those which can be assigned true or false and has the type bool with it. In the code above “bVal” is not initialized and thus has a zero-value. The zero-value for a boolean is false.
Using equality operator Finally, for a task as simple as this is, we can write our own validator using the equality operator, as shown below. But like the previous function, this also sets the boolean value to false on any invalid input. That's all about converting a string to bool value in C++.
use the strconv package
docs
strconv.FormatBool(v)
func FormatBool(b bool) string FormatBool returns "true" or "false"
according to the value of b
The two main options are:
strconv.FormatBool(bool) stringfmt.Sprintf(string, bool) string with the "%t" or "%v" formatters.Note that strconv.FormatBool(...) is considerably faster than fmt.Sprintf(...) as demonstrated by the following benchmarks:
func Benchmark_StrconvFormatBool(b *testing.B) {
for i := 0; i < b.N; i++ {
strconv.FormatBool(true) // => "true"
strconv.FormatBool(false) // => "false"
}
}
func Benchmark_FmtSprintfT(b *testing.B) {
for i := 0; i < b.N; i++ {
fmt.Sprintf("%t", true) // => "true"
fmt.Sprintf("%t", false) // => "false"
}
}
func Benchmark_FmtSprintfV(b *testing.B) {
for i := 0; i < b.N; i++ {
fmt.Sprintf("%v", true) // => "true"
fmt.Sprintf("%v", false) // => "false"
}
}
Run as:
$ go test -bench=. ./boolstr_test.go
goos: darwin
goarch: amd64
Benchmark_StrconvFormatBool-8 2000000000 0.30 ns/op
Benchmark_FmtSprintfT-8 10000000 130 ns/op
Benchmark_FmtSprintfV-8 10000000 130 ns/op
PASS
ok command-line-arguments 3.531s
In efficiency is not too much of an issue, but genericity is, just use fmt.Sprintf("%v", isExist), as you would for almost all the types.
you may use strconv.FormatBool like this:
package main
import "fmt"
import "strconv"
func main() {
isExist := true
str := strconv.FormatBool(isExist)
fmt.Println(str) //true
fmt.Printf("%q\n", str) //"true"
}
or you may use fmt.Sprint like this:
package main
import "fmt"
func main() {
isExist := true
str := fmt.Sprint(isExist)
fmt.Println(str) //true
fmt.Printf("%q\n", str) //"true"
}
or write like strconv.FormatBool:
// FormatBool returns "true" or "false" according to the value of b
func FormatBool(b bool) string {
if b {
return "true"
}
return "false"
}
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