Golang Notes

GO LANG SPEC + OPERATOR INTEGER OPERAND GOLANG PLAYGO+ROUND EFFECTIVE GO https://golang.org/ref/spec

go fmt formating

package main
import (
       "fmt"
)

func main() {
    n, err := fmt.Println("Hello, playground", 42, true)
        fmt.Println(n)
        fmt.Println(err)
}

== Output ===
Hello, playground 42 true
26
<nil>


DECLARE AND ASSIGN

x :   <--- DECLARE
= 42  <--- ASSIGN

x := 42 DECLARE AND ASSIGN

##############################################

Short declation doesnt work outside curly only function inside body
var work outside curly global

var z int = integer and value of zero / false / nil

##############################################

var y = 42
var z = "any"


func main() {
fmt.Println(y)
fmt.Printf("%T\n",y)
fmt.Println(z)
fmt.Printf("%T\n",z)

=

42
int
any
string

###################################################

fmt with example

fmt.Println(y) -> 42
fmt.Printf("%b\n",y)  -> binary and so on check doc

add all fmt.Printf("%#x\t%b\t%x", y, y, y)  t is tab printing


###################################################
convertion or casting

var a int
type hotdog int
var b hotdog

convert a= int(b)

https://play.golang.org/p/jwqDWUpyvid
https://play.golang.org/p/4tFoLHyhCyz
https://play.golang.org/p/jqf-_SdWewl
https://play.golang.org/p/HmgBMQn0W59
https://play.golang.org/p/Ar29qvlangV

#INT FLOAT
https://play.golang.org/p/qpbBp4SvZRM
#INT8
https://play.golang.org/p/k4yy4KlkvSw
dont work https://play.golang.org/p/9m2Eb8PGfI9

# RUNTIME PACKAGE show OS and Architecture
https://play.golang.org/p/I8YCQqnicvv

#uint8 is byte this is convertion or slice of byte ascii coding scheme
https://play.golang.org/p/8LNPPV_XelN
https://play.golang.org/p/XpLOO-EmgEG <-hexa

#constant like variables
https://play.golang.org/p/mtGfBxMrlth

#iota increment
https://play.golang.org/p/vZ-TlPHDmVK

#bit shifting
https://play.golang.org/p/twouwaVyQC0

#kb to mb to gb
https://play.golang.org/p/Xbem47fTmD8

#iota donot use first line which is zeo
https://play.golang.org/p/6EZkT90Hytw


#variables decmal hexa bit shifting
https://play.golang.org/p/BDsMikH-nOD


#raw string literal
https://play.golang.org/p/AlVFunh7JaL

#iota add +1
https://play.golang.org/p/QWqnXcElqEV


rune is int32
byte is uint8


video 48 digeridoo

#for loop
package main
import "fmt"
func main(){
    for init; condition;post {
    fmt.Println("Hello, playground")

}
}


for i := 0; i <= 100; i++
//++ is operator increment by1
fmt.Println(i)



#nesting loop outerandinsideloop
https://play.golang.org/p/W-MgdztTLII

package main

import (
    "fmt"
)

func main() {
    for i := 0; i <= 10; i++ {
        fmt.Printf("The outer loop: %d\n", i)
        for j := 0; j < 3; j++ {
            fmt.Printf("\t\t The inner loop: %d\n", j)

        }
    }
}


### loop
https://play.golang.org/p/jmcuG6lb7eL

x:=1
for x < 10 {
    fmt.Println(x)
    x++
}
fmt.Println("done.")
}

### print 1 to 10000
https://play.golang.org/p/xN47SXb2qOR
### print 65 to 90
https://play.golang.org/p/u-53lQqEsjP
### print 65 to 90 unicode
https://play.golang.org/p/rnCBaIUvGn3
###print every letter 3 times
https://play.golang.org/p/qKmGpn3pHxc


##ARRAY
https://play.golang.org/p/wqyYCgfA0Hg
https://play.golang.org/p/MGz-TCaHkTA

## SLICES
https://play.golang.org/p/u6awtNYLPsu
https://play.golang.org/p/T2uplc8I2JL

## ACCESSING INDEX POSITION VARIABLES ON SLICES
https://play.golang.org/p/rPExKxSW7mF


## SLICING A SLICE
https://play.golang.org/p/OqsjB2b1-hZ

## appennding slices
https://play.golang.org/p/xzGMDESHMce
https://play.golang.org/p/4Oqr5A2AcK0
https://play.golang.org/p/JYYrDxlVgdr
### DELETE FROM SLICE
https://play.golang.org/p/cxpQ_0roj-J
## MAKE SLICE
https://play.golang.org/p/pZwnOftrcLm
https://play.golang.org/p/9FsHGXcFl89

## Maps mapping
https://play.golang.org/p/SgVtSFfidJx

## MAP ADD ELEMENT RAnge
https://play.golang.org/p/bXlQAdjdY4g
MAP SHOWING RECORS
https://play.golang.org/p/R5gUTw4vM9X
https://play.golang.org/p/YgvZMAxABMp added additional record
https://play.golang.org/p/cYnm0x4ahqQ deleted a record

https://play.golang.org/p/Us7n8pC8Nm7


## ARRAY I WANT TO PRINT ONLY 5 CHAR
https://play.golang.org/p/32k9Q1jWdI1

STRUCT complex data  composite data type aggregate data type
https://play.golang.org/p/8yaATcxQ6_y
https://play.golang.org/p/QKGqGpMJ4Pw

embed one type to another type
https://play.golang.org/p/QI1q94V78vn

https://play.golang.org/p/dE-ixErDWC1

##range own type with underlying type
 https://play.golang.org/p/qa8CrVEphtD

## different data structure
https://play.golang.org/p/UMGFR-Pri1J

https://play.golang.org/p/UMGFR-Pri1J

#stuct
https://play.golang.org/p/-TEgungwX8P