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

If formatting some bytes, hex needs a 2 digits representation, with leading 0.

For exemple: 1 => '01', 15 => '0f', etc.

It is possible to force Sprintf to respect this :

h:= fmt.Sprintf("%02x", 14)
fmt.Println(h) // 0e
h2:= fmt.Sprintf("%02x", 231)
fmt.Println(h2) // e7

The pattern "%02x" means:

• '0' force using zeros
• '2' set the output size as two charactes
• 'x' to convert in hexadecimal