How can I convert from int to hex

Question

I want to convert from int to hex in Golang. In strconv, there is a method that converts strings to hex. Is there a similar method to get a hex string from an int?

Answer 1

Sprintf is more versatile but FormatInt is faster. Choose what is better for you

func Benchmark_sprintf(b *testing.B) { // 83.8 ns/op
    for n := 0; n < b.N; n++ {
        _ = fmt.Sprintf("%x", n)
    }
}
func Benchmark_formatint(b *testing.B) { // 28.5 ns/op
    bn := int64(b.N)
    for n := int64(0); n < bn; n++ {
        _ = strconv.FormatInt(n, 16)
    }
}