Fixed digits after decimal with f-strings

Question

Is there an easy way with Python f-strings to fix the number of digits after the decimal point? (Specifically f-strings, not other string formatting options like .format or

Answer 1

Adding to Rob's answer, you can use format specifiers with f strings (more here).

• You can control the number of decimals:

pi = 3.141592653589793238462643383279

print(f'The first 6 decimals of pi are {pi:.6f}.')

The first 6 decimals of pi are 3.141593.

• You can convert to percentage:

grade = 29/45

print(f'My grade rounded to 3 decimals is {grade:.3%}.')

My grade rounded to 3 decimals is 64.444%.

• You can do other things like print constant length:

from random import randint
for i in range(5):
    print(f'My money is {randint(0, 150):>3}$')

My money is 126$
My money is   7$
My money is 136$
My money is  15$
My money is  88$

• Or even print with a comma thousand separator:

print(f'I am worth {10000000000:,}$')

I am worth 10,000,000,000$