[Go Lang] String Formatting

package main

import (
    "fmt"
    "os"
)

type point struct {
    x, y int
}

func main() {

    p := point{1, 2}
    fmt.Printf("struct1: %v\n", p)				// struct1: {1 2}

    fmt.Printf("struct2: %+v\n", p)				// struct2: {x:1 y:2}

    fmt.Printf("struct3: %#v\n", p)				// struct3: main.point{x:1, y:2}

    fmt.Printf("type: %T\n", p)					// type: main.point

    fmt.Printf("bool: %t\n", true)				// bool: true

    fmt.Printf("int: %d\n", 123)				// int: 123

    fmt.Printf("bin: %b\n", 14)					// bin: 1110

    fmt.Printf("char: %c\n", 33)				// char: !

    fmt.Printf("hex: %x\n", 456)				// hex: 1c8

    fmt.Printf("float1: %f\n", 78.9)			// float1: 78.900000

    fmt.Printf("float2: %e\n", 123400000.0)		// float2: 1.234000e+08
    fmt.Printf("float3: %E\n", 123400000.0)		// float3: 1.234000E+08

    fmt.Printf("str1: %s\n", "\"string\"")		// str1: "string"

    fmt.Printf("str2: %q\n", "\"string\"")		// str2: "\"string\""

    fmt.Printf("str3: %x\n", "hex this")		// str3: 6865782074686973

    fmt.Printf("pointer: %p\n", &p)				// pointer: 0xc0000ba000

    fmt.Printf("width1: |%6d|%6d|\n", 12, 345)	// width1: |    12|   345|

    fmt.Printf("width2: |%6.2f|%6.2f|\n", 1.2, 3.45)	// width2: |  1.20|  3.45|

    fmt.Printf("width3: |%-6.2f|%-6.2f|\n", 1.2, 3.45)	// width3: |1.20  |3.45  |

    fmt.Printf("width4: |%6s|%6s|\n", "foo", "b")		// width4: |   foo|     b|

    fmt.Printf("width5: |%-6s|%-6s|\n", "foo", "b")		// width5: |foo   |b     |

    s := fmt.Sprintf("sprintf: a %s", "string")			
    fmt.Println(s)										// // sprintf: a string

    fmt.Fprintf(os.Stderr, "io: an %s\n", "error")		// io: an error
}