Use of F-strings in Python
Fstrings in Python
F-strings provide a way to embed expressions inside string literals, using a minimal syntax. It should be noted that an f-string is really an expression evaluated at run time, not a constant value. In Python source code, an f-string is a literal string, prefixed with ‘f’, which contains expressions inside braces.
String Format
- Python supports multiple ways to format text strings. These include %-formatting , str.format() , and string.template. All of them have their on advantages but in addition have it’s own disadvantages which creates problem during practice like we can not concat string and integers implicitly.
- The main Use of F-strings in Python is F-strings are faster than the two most commonly used string formatting mechanisms, which are %-formatting and str.format().
- Fstrings in Python provide a concise, readable way to include the value of Python expressions inside strings.
Example:
- w=70 , print(‘My weight is ‘ + w + ‘kgs’)
TypeError: Can’t convert ‘int’ object to str implicitly
- w=70 #using f-strings
- print(f”My weight is {w} kgs.”)
- My weight is 70 kgs.
Code 1:
Run
#f-strings
w=70
print(f"My weight is {w} kgs.")
webs='PrepInsta'
print(f"{webs} is for Prepsters.")Output:
My weight is 70 kgs.
PrepInsta is for Prepsters.
Code 2:
Run
PI=22/7
print(f"Value of pi is {PI:.50F}")
#OR
print(f"Value of pi is {22/7:.50f}")
Output:
Value of pi is 3.14285714285714279370154144999105483293533325195312
Value of pi is 3.14285714a285714279370154144999105483293533325195312
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