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In Python, a formatted string is a way to create strings that include variables or expressions by embedding them directly inside the string. Formatted strings make it easier to create dynamic strings with variable values without the need for multiple string concatenations.
There are several ways to create formatted strings in Python. Two commonly used methods are:
- Using f-strings (Formatted String Literals) - Available in Python 3.6 and above:
F-strings allow you to embed expressions directly inside the string by placing the variable names or expressions inside curly braces
{}
. The f before the opening quote indicates that the string is a formatted string.Example:
pythonCopy code
name = "Alice" age = 30 formatted_string = f"My name is {name} and I am {age} years old." print(formatted_string) # Output: My name is Alice and I am 30 years old.
- Using str.format() method - Available in Python 2.6 and Python 3.x:
The
str.format()
method allows you to insert values into a string by specifying placeholders inside curly braces{}
and calling theformat()
method on the string, providing the values to be inserted as arguments toformat()
.Example:
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name = "Bob" age = 25 formatted_string = "My name is {} and I am {} years old.".format(name, age) print(formatted_string) # Output: My name is Bob and I am 25 years old.
In both methods, the variables or expressions inside the curly braces are replaced with their corresponding values. The
f-string
method is more concise and generally preferred in Python 3.6 and later versions, while thestr.format()
method remains useful for older Python versions.You can use both methods to format strings, but f-strings are generally considered more readable and expressive, making it easier to create formatted strings in Python.
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