gobyexample/formatting/formatting.go

package formatting

import (
	"fmt"
	"math"
)

var f = fmt.Printf

type Person struct {
	name string
	age  uint
}

func Formatting() {
	p := Person{"Nadeshiko", 15}

	f("int: %d\n", 5)
	f("float: %f\n", 4)
	f("float (scientific): %e\n", math.Pow(2, 32))
	f("string: %s\n", "hello")
	f("go value loose: %v\n", p)
	f("go value strict: %+v\n", p)
	f("go value verbose: %#v\n", p)
	f("go bool: %t\n", true)
	f("go type: %T\n", p)
	f("go ptr address: %p\n", &p)
	f("go hex string: %x\n", "foo")
	f("go hex int: %x\n", 16)
	f("go bin int: %b\n", 5)
	f("go oct int: %o\n", 8)
	f("go num width: |%5d|\n", 2)
	f("go num width (left align): |%-5d|\n", 2)
	f("go float precision (left align): |%-5.2f|\n", 3.141516)
	f("go char: %c\n", 97)
	f("go custom width specifier: |%*s|\n", 5, "foo")
}