Golang: How to pad a number with zeros when printing?

Question

How can I print a number or make a string with zero padding to make it fixed width?

For instance, if I have the number 12 and I want to make it 00

Answer 1

For those that want to right pad, you can do this:

str2pad := "12"
padWith := "0"
amt2pad := 6

//This will make sure there is always 6 characters total, padded on the right side
//Note to check if strings.Repeat returns a negative value
paddedStr := str2pad + strings.Repeat(padWith, amt2pad - len(str2pad))

//Outputs 120000