print range b3:d11

I am reading through a python script that takes an input of XML files and outputs an XML file. However, I do not understand the printing syntax. Can someone please explain what f in print(f"..... print may be a function or a statement (language construct), depending on the major version of Python you're using, but it's definitely not an operator. For Python 2 and earlier, it should be as simple as described in Re: How does one print without a CR? by Guido van Rossum (paraphrased): Is it possible to print something, but not automatically have a carriage return appended to it? Yes, append a comma after the last argument to print. For instance, this loop prints the numbers 0..9 on a line separated by spaces. Note the parameterless "print ... print ("Hi") In both versions, % is an operator which requires a string on the left-hand side and a value or a tuple of values or a mapping object (like dict) on the right-hand side. python - How to print like printf in Python3? - Stack Overflow

I am using python to work out how many children would be born in 5 years if a child was born every 7 seconds. The problem is on my last line. How do I get a variable to work when I'm printing text ... How can I print variable and string on same line in Python?