How to format and print data in a tabular format (table) using fmt in Go?

To format and print data in a tabular format using fmt in Go, you can follow these steps:

Import the fmt package:

import "fmt"

Define the data you want to display in the table. This can be a slice of structs, a slice of slices, or any other suitable data structure.

data := [][]string{
    {"John", "Doe", "[email protected]"},
    {"Jane", "Smith", "[email protected]"},
    {"Bob", "Johnson", "[email protected]"},
}

Determine the maximum width of each column by iterating over the data and finding the length of the longest element in each column.

columnWidths := make([]int, len(data[0]))
for _, row := range data {
    for i, cell := range row {
        if len(cell) > columnWidths[i] {
            columnWidths[i] = len(cell)
        }
    }
}

Iterate over the data and print each row in a tabular format using fmt.Printf and the %*s format specifier to specify the width of each cell.

for _, row := range data {
    for i, cell := range row {
        fmt.Printf("%-*s ", columnWidths[i], cell)
    }
    fmt.Println()
}

Putting it all together, the complete code will look like this:

package main

import "fmt"

func main() {
    data := [][]string{
        {"John", "Doe", "[email protected]"},
        {"Jane", "Smith", "[email protected]"},
        {"Bob", "Johnson", "[email protected]"},
    }

    columnWidths := make([]int, len(data[0]))
    for _, row := range data {
        for i, cell := range row {
            if len(cell) > columnWidths[i] {
                columnWidths[i] = len(cell)
            }
        }
    }

    for _, row := range data {
        for i, cell := range row {
            fmt.Printf("%-*s ", columnWidths[i], cell)
        }
        fmt.Println()
    }
}

This code will output the data in a tabular format like this:

John Doe      [email protected] 
Jane Smith    [email protected]
Bob  Johnson  [email protected]

You can adjust the formatting by modifying the separator between cells or adding additional formatting options.