详解go 中的 fmt 占位符

fmt.Printf("%v\n", 100)}//100

o := struct{ name string }{"tim"}
fmt.Printf("%+v\n", o)}}
//{name:tim}

o := struct{ name string }{"tim"}
fmt.Printf("%#v\n", o)  }
//struct { name string }{name:"tim"}

o := struct{ name string }{"tim"}
fmt.Printf("%T\n", o)  }
//struct { name string }

fmt.Printf("100%%\n")  }//100%

t := true
fmt.Printf("value: %t", t)

fmt.Printf("%c\n", 65)//A

fmt.Printf("%c\n", 65)//A

fmt.Printf("%d\n", 65)//65

fmt.Printf("%o\n", 65)//101

fmt.Printf("%x\n", 65)//41

fmt.Printf("%X\n", 65)//41

fmt.Printf("%U\n", 65) // U+0041

fmt.Printf("%q\n", 65)//'A'

fmt.Printf("%b\n", 12.34)//6946802425218990p-49

fmt.Printf("%e\n", f)//1.234000e+01

fmt.Printf("%G\n", f)//12.34

fmt.Printf("%g\n", f)//12.34

fmt.Printf("%F\n", 12.34)//12.340000

fmt.Printf("%f\n", f)//12.340000

fmt.Printf("%E\n", f)//1.234000E+01

fmt.Printf("%s\n", "tim")//tim

fmt.Printf("%q\n", "tim")//"tim"

fmt.Printf("%X\n", "tim")//E5BEAEE5AEA2

fmt.Printf("%x\n", "tim")//e5beaee5aea2

t := []int{1}fmt.Printf("value: %p", t)// value: 0x14000190008

v := 92873.2309837 fmt.Printf("value: %f\n", v) // value: 92873.230984

fmt.Printf("value: %9f\n", v)// value: 92873.230984

fmt.Printf("value: %9.f\n", v)// value:     92873

fmt.Printf("value: %9.2f\n", v)// value:  92873.23

fmt.Printf("value: %.2f\n", v)// value: 92873.23

v := -92873.2309837fmt.Printf("value: %+f", v)

v := 92873.2309837fmt.Printf("value: % f", v)

v := -92873.2309837fmt.Printf("value: %07.f", v)// value: -092873

v := 101fmt.Printf("value: %#o", v)// value: 0145

v := 101.35345345fmt.Printf("value: %-3.1f", v)// value: 101.4