Python fstrings

elem = 10

elem_index = 5

def to_lowercase(st):

return st.lower()

#Formatted string literals (f-strings)

#The idea behind f-strings is to make string interpolation simpler.

#f-strings are expressions evaluated at runtime rather than constant values

print(f'Index of element {elem} is {elem_index}')

#call functions from f-strings

print(f'String to lowercase: {to_lowercase("TEST_STRING")}')

print(f'String to lowercase: {"TEST_STRING".lower()}')

#Format - used in previous versions of python

print('Index of element {} is {}'.format(elem, elem_index))

elapsed = 23.5678

print(f"{__file__} executed in {elapsed:0.2f} seconds.")

Output:

Index of element 10 is 5 String to lowercase: test_string String to lowercase: test_string Index of element 10 is 5
main.py executed in 23.57 seconds.