How to Zero-Pad Numbers in Go?

Formatting Numbers with Zero Padding in Go

Printing numbers in a fixed width is a common requirement in programming. In Go, the fmt package provides a convenient way to pad numbers with zeros using the %0 notation.

For example, to pad the number 12 to a width of 6 with zeros, you can use the following code:

fmt.Printf("|%06d|%6d|\n", 12, 345)

Output:

|000012|   345|

The d format specifier tells the fmt package to print the number 12 with a minimum width of 6, padding with zeros as needed. The m format specifier prints 345 with a minimum width of 6, but without any padding.

You can experiment with the fmt package and zero padding here: http://play.golang.org/p/cinDspMccp

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