Golang: What is String

By Xah Lee. Date: .

String is a datatype that represent sequence of characters. However, different programing languages implement them in different ways. Understanding this is critical for mastering the language, because string is one of the most used datatype.

In golang, a string is technically a sequence of bytes.

If you are beginner, you can skip this section.

String is a Sequence of Bytes

package main

import "fmt"

// character A has codepoint 65 in decimal , and 41 in hexadecimal. So, "A" and "\x41" create the same string.

func main() {

	fmt.Printf("%v\n", "A" == "\x41") // true

}
package main

import "fmt"

// showing how string is byte sequence, not char sequence

func main() {

	// string of a single char
	var x = "♥"
	// name: BLACK HEART SUIT
	// codepoint 9829, hexadecimal 2665
	// utf8 encoding: E2 99 A5

	// length
	fmt.Printf("%v\n", len(x)) // 3

	// first byte in hexadecimal
	fmt.Printf("%x\n", x[0]) // e2

}

Golang String