How to use "Form" command in TString class

Newbie
1

Please read tips for efficient and successful posting and posting code

ROOT Version: Not Provided
Platform: Not Provided
Compiler: Not Provided

What is the meaning of the “Form” command in the class TString?
like this:

string cut_s=name+Form(">%f",lower)+"&&"+name+Form("<%f",upper);
2

Form as the same syntax as the printf command in C (search on the web).
Imagine you have a variable lower like:

float lower = 12345.;

then:

Form(">%f",lower)

will be the string :

>12345.