strconv package in Golang

Go language provides a strconv package that implements conversions to and from string representations of basic data types. To access the functions of the strconv package you need to import the strconv package in your program with the help of the import keyword.

Function	Description
func AppendBool	This function is used to appends true or false according to the value of x, to dst and returns the extended buffer.
func AppendFloat	This function is used to appends the string form of the floating-point number f, as generated by FormatFloat, to dst and returns the extended buffer.
func AppendInt	This function is used to appends the string form of the integer i, as generated by FormatInt, to dst and returns the extended buffer.
func AppendQuote	This function is used to appends a double-quoted Go string literal representing s, as generated by Quote, to dst and returns the extended buffer.
func AppendQuoteRune	This function is used to appends a single-quoted Go character literal representing the rune, as generated by QuoteRune, to dst and returns the extended buffer.
func AppendQuoteRuneToASCII	This function is used to appends a single-quoted Go character literal representing the rune, as generated by QuoteRuneToASCII, to dst and returns the extended buffer.
func AppendQuoteRuneToGraphic	This function is used to appends a single-quoted Go character literal representing the rune, as generated by QuoteRuneToGraphic, to dst and returns the extended buffer.
func AppendQuoteToASCII	This function is used to appends a double-quoted Go string literal representing s, as generated by QuoteToASCII, to dst and returns the extended buffer.
func AppendQuoteToGraphic	This function is used to appends a double-quoted Go string literal representing s, as generated by QuoteToGraphic, to dst and returns the extended buffer.
func AppendUint	This function is used to appends the string form of the unsigned integer i, as generated by FormatUint, to dst and returns the extended buffer.
func Atoi	This function is equivalent to ParseInt(s, 10, 0) and converted to type int.
func CanBackquote	This function is used to check whether the given string can be represented unchanged as a single-line backquoted string without control characters other than tab.
func FormatBool	This function is used to return true or false according to the value of x.
func FormatFloat	This function is used to converts the floating-point number f to a string, according to the format fmt and precision prec.
func FormatInt	This function is used to return the string representation of i in the given base, for 2 <= base <= 36.
func FormatUint	This function is used to return the string representation of i in the given base, for 2 <= base <= 36.
func IsGraphic	This function is used to check whether the rune is defined as a Graphic by Unicode.
func IsPrint	This function is used to check whether the rune is defined as printable by Go, with the same definition as unicode.IsPrint: letters, numbers, punctuation, symbols and ASCII space.
func Itoa	This function is equivalent to FormatInt(int64(i), 10).
func ParseBool	This function is used to returns the boolean value represented by the string.
func ParseFloat	This function is used to converts the string s to a floating-point number with the precision specified by bitSize: 32 for float32, or 64 for float64.
func ParseInt	This function interpret a string str in the given base (0, 2 to 36) and bit size (0 to 64) and returns the corresponding value i.
func ParseUint	This function is like ParseInt but for unsigned numbers.
func Quote	This function is used to returns a double-quoted Go string literal representing s.
func QuoteRune	This function is used to returns a single-quoted Go character literal representing the rune.
func QuoteRuneToASCII	This function is used to returns a single-quoted Go character literal representing the rune.
func QuoteRuneToGraphic	This function is used to returns a single-quoted Go character literal representing the rune.
func QuoteToASCII	This function is used to returns a double-quoted Go string literal representing s.
func QuoteToGraphic	This function is used to returns a double-quoted Go string literal representing s.
func Unquote	This function interpret s as a single-quoted, double-quoted, or backquoted Go string literal, returning the string value that s quotes.
func UnquoteChar	This function decodes the first character or byte in the escaped string or character literal represented by the string s.

Example 1:

// Golang program to illustrate the
// strconv.AppendQuoteRuneToASCII() function
package main

import (
    "fmt"
    "strconv"
)

func main() {

         // Converting Unicode characters to
         // ASCII strings resulting from "single quotes"
         // append the result to the end of the given []byte
         // Using AppendQuoteRuneToASCII() function
         num := []byte("Rune : ")
         num = strconv.AppendQuoteRuneToASCII(num, 'c')
         fmt.Println(string(num))

}

Output:

Rune : 'c'

Example 2 :

// Golang program to illustrate
// strconv.Atoi() function
package main

import (
    "fmt"
    "strconv"
)

func main() {

    // Using Atoi() function
    a := "244"
    b, e := strconv.Atoi(a)
    if e == nil {
        fmt.Printf("%T \n %v", b, b)
    }

}

Output:

int 
 244