fmt

README

Go fmt Package

The fmt package is used to format and print values. It provides functions like Print, Printf, and Println to print values to the standard output. The fmt package also provides functions like Sprint, Sprintf, and Sprintln to format values and return the resulting string.

Verb	Meaning	Go Code Example
%c	Prints a character	fmt.Printf("%c", 'A')
%d	Prints an integer in base ten	fmt.Printf("%d", 10)
%f	Prints a floating-point number with default width and precision	fmt.Printf("%f", 3.14)
%t	Prints a boolean value	fmt.Printf("%t", true)
%s	Prints a string value	fmt.Printf("%s", "Hello, World!")
%v	Prints the value in the default format	fmt.Printf("%v", 10)
%b	Prints the binary representation	fmt.Printf("%b", 10)
%x	Prints the hexadecimal representation	fmt.Printf("%x", 10)
%e	Prints the scientific notation	fmt.Printf("%e", 3.14)

The given table shows some of the common verbs used in the fmt package. The Printf function is used to format and print values to the standard output. The first argument to the Printf function is a format string that contains verbs and the second argument is the value to be printed.

The Sprintf function is used to format values and return the resulting string. It takes a format string and a value as arguments and returns the formatted string.

The Sprint function is similar to the Sprintf function, but it does not take a format string. It takes a value as an argument and returns the formatted string.

The Print, Println, and Println functions are used to print values to the standard output. The Print function prints the value without a newline, the Println function prints the value with a newline, and the Println function prints the value with a newline and spaces between the values.

The fmt package also provides functions like Fprint, Fprintf, and Fprintln to print values to a specific io.Writer like a file or a network connection.

Example:

package main

import "fmt"

func main() {
    fmt.Printf("%c\n", 'A')
    fmt.Printf("%d\n", 10)
    fmt.Printf("%f\n", 3.14)
    fmt.Printf("%t\n", true)
    fmt.Printf("%s\n", "Hello, World!")
    fmt.Printf("%v\n", 10)
    fmt.Printf("%b\n", 10)
    fmt.Printf("%x\n", 10)
}

Output:

A
10
3.140000
true
Hello, World!
10
1010
a

In the above example, we have used the Printf function to print values to the standard output. We have used different verbs like %c, %d, %f, %t, %s, %v, %b, and %x to format and print values.