fmt

path: courses/go-course/fmt.md

- **fileName**: fmt
- **Created on**: 2024-08-23 19:33:05

starting go course : -

installation go lang pacman -S golang

fmt library is library using for print string number boolean any thing in screen

package main
import "fmt"
func main() {
    fmt.Println("welcome from yossef")
    return
}

package main : mean that program start execute from the main func inside the file the starting point for the program
starting import using the import keyword
func for making a function
for run the go file using this script

#!/usr/bin/bash
go build main.go ## execuate file binary main and run the main file 
./main

- now fmt.Println using for print new text in new line and there is alot of method for printing in fmt the commen one to use it Println

fmt Package Print Methods in Go

Method	Description	Example	Output
`fmt.Print()`	Prints the provided arguments as-is to the standard output.	`go<br>fmt.Print("Hello, ")<br>fmt.Print("world!")`	`Hello, world!`
`fmt.Println()`	Similar to `fmt.Print()`, but adds a newline (`\n`) at the end of the output.	`go<br>fmt.Println("Hello,")<br>fmt.Println("world!")`	`Hello,` `world!`
`fmt.Printf()`	Allows formatted string output with format specifiers.	`go<br>name := "Alice"<br>age := 25<br>fmt.Printf("Name: %s, Age: %d\n", name, age)`	`Name: Alice, Age: 25`
`fmt.Sprint()`	Returns a formatted string without printing it.	`go<br>greeting := fmt.Sprint("Hello, ", "world!")<br>fmt.Println(greeting)`	`Hello, world!`
`fmt.Sprintln()`	Similar to `fmt.Sprint()`, but adds a newline (`\n`) at the end of the string.	`go<br>greeting := fmt.Sprintln("Hello, world!")<br>fmt.Println(greeting)`	`Hello, world!`
`fmt.Sprintf()`	Similar to `fmt.Printf()`, but returns the formatted string instead of printing it.	`go<br>name := "Alice"<br>age := 25<br>formattedString := fmt.Sprintf("Name: %s, Age: %d", name, age)<br>fmt.Println(formattedString)`	`Name: Alice, Age: 25`
`fmt.Fprint()`	Similar to `fmt.Print()`, but prints to a specified `io.Writer` instead of the standard output.	`go<br>fmt.Fprint(os.Stdout, "Hello, world!")`	`Hello, world!`
`fmt.Fprintln()`	Similar to `fmt.Println()`, but prints to a specified `io.Writer` and adds a newline at the end.	`go<br>fmt.Fprintln(os.Stdout, "Hello, world!")`	`Hello, world!`
`fmt.Fprintf()`	Similar to `fmt.Printf()`, but prints to a specified `io.Writer` instead of the standard output.	`go<br>name := "Alice"<br>age := 25<br>fmt.Fprintf(os.Stdout, "Name: %s, Age: %d\n", name, age)`	`Name: Alice, Age: 25`

for string formated

string-format-go.md

continue:string-format-go.md
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