How to align text and numbers in formatted output with fmt in Go?

To align text and numbers in formatted output using the fmt package in Go, you can utilize the strconv.Itoa() function to convert numbers to strings and then use strings.Repeat() to add appropriate spacing. Here's an example:

package main

import (
	"fmt"
	"strconv"
	"strings"
)

type Item struct {
	Name  string
	Price int
}

func main() {
	items := []Item{
		{"Apple", 10},
		{"Banana", 20},
		{"Orange", 30},
	}

	fmt.Println("Item\t\tPrice")
	fmt.Println(strings.Repeat("-", 20)) // Line Separator

	for _, item := range items {
		// Right-align the item name with a tab separator
		name := item.Name + strings.Repeat(" ", 16-len(item.Name))

		// Left-align the price using strconv.Itoa()
		price := strconv.Itoa(item.Price)

		fmt.Println(name + "\t" + price)
	}
}

In the example above, the output will be formatted with the item names right-aligned and the prices left-aligned. The strings.Repeat() function is used to add whitespace in order to align the text and numbers properly.

Output:

Item        Price
--------------------
Apple              10
Banana             20
Orange             30

By adjusting the number of spaces added, you can control the alignment as per your requirements.