Result Size: 625 x 571
demo_string_placeholder8.py:
​x
 
#Use "," to add a comma as a thousand separator:
​
txt = "The universe is {:,} years old."
​
print(txt.format(13800000000))
​
C:\Users\My Name>python demo_string_placeholder8.py
The universe is 13,800,000,000 years old.