Bugl — Daily coding puzzles and drills

String Format

As we learned in the Python Variables chapter, we cannot combine strings and numbers like this:

Example age = 36 #This will produce an error:

txt = "My name is John, I am " + age print(txt)

Formula

But we can combine strings and numbers by using f - strings or the format()

method!

Formula

F - String was introduced in Python 3.6, and is now the preferred way of formatting strings.
To specify a string as an f - string, simply put an f

in front of the string literal, and add curly brackets

{}

as placeholders for variables and other operations.

age = 36 txt = f"My name is John, I am {age}"
print(txt)

A placeholder can contain variables, operations, functions, and modifiers to format the value.

Add a placeholder for the price variable:

price = 59 txt = f"The price is {price} dollars"
print(txt)

A placeholder can include a modifier to format the value. A modifier is included by adding a colon

followed by a legal formatting type, like.2f which means fixed point number with 2 decimals:

Display the price with 2 decimals:

price = 59 txt = f"The price is {price:.2f} dollars"
print(txt)

A placeholder can contain Python code, like math operations:

Perform a math operation in the placeholder, and return the result:

txt = f"The price is {20 * 59} dollars"
print(txt)

String Formatting chapter.