QString format %1 but multiple arguments

Question

I stumbled upon this line of code in a project I am working on:

QString("%1").arg(2176782335, 6, 36, QChar('0')).toLatin1()

Why are there even multiple arguments for just %1 ? Shouldn't this only accept the first parameter in arg() ?

Answer 1

It looks like this overload of QString::arg . Arguments are:

• number to be displayed (integer in this case)
• minimum amount of space for the rendered number
• base (hex/dec/oct/whatever) - in your example it is quite unusual system with base 36 which uses all digits and all letters of Latin alphabet
• filler character

If you want multiple placeholders in your string, just call arg multiple times, like shown in the docs.

Also read about number formats .