Text analysis doubt

Question

The code given below is to find percentage oof characters that each character occupies in a text file. Please explain me last print statement
for char in "abcdefghijklmnopqrstuvwxyz":
perc = 100 * count_char(text, char) / len(text)
print("{0} - {1}%".format(char, round(perc, 2)))

Answer 1

f string and format string. Check at python course

Answer 2

copy paste below code and see. Hope you will understand:

a = "Aman"
b = "Bayram"

print(f'{a} and {b} are friends')
print("{0} and {1} are friends".format(a,b))

Answer 3

What is this ({0}-{1}%) for?

Answer 4

Ohk..i got it. Thanks