How Can I Achieve the Functionality of C's `getchar()` in Go, Including Tab Key Handling?

Finding a Go Equivalent for C's getchar()

In C programming, getchar() is a commonly used function for reading a single character from the standard input without buffering. Does Go offer a function that exhibits similar functionality, particularly one that can handle tab keystrokes in a console environment? This capability would prove instrumental in developing autocomplete features for a console application.

The Go Alternative: A Detailed Breakdown

Go does not provide a direct equivalent to C's getchar(). However, we can achieve similar functionality using the following code:

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {

    reader := bufio.NewReader(os.Stdin)
    input, _ := reader.ReadString('\n')

    fmt.Printf("Input Char Is : %v", string([]byte(input)[0]))
}

Explanation:

This Go code employs the following steps:

1. Create a bufio.Reader to read input from the standard input, effectively echoing the functionality of getchar() in C.
2. Utilize the ReadString() method to read a line of input from the user.
3. Convert the first byte of the input string to a character using casting and type conversion.
4. Print the character to the console, resembling the output format of getchar() in C.

Note:

It's important to remember that getchar() in C requires the user to press the enter key after entering a character. The Go code presented here does not have this limitation. If you require this behavior, consider exploring alternative approaches such as curses or readline, as suggested in the provided documentation.

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