How to insert variables into a String in Python. That’s the topic I want to introduce to you today. There are many ways to insert a variable into a string. This article will show you three ways: using commas, format() function, and f-string. If you’re curious about this topic, read it all.
Inserting variables into a String in Python
Use commas
Using commas is an easy and common practice, but one downside is the inability to customize large volumes of data.
Example:
name = 'John'
age = 16
habits = 'Football'
# Use commas to insert the variable into the string.
print('Name:', name, '; Age:', age, '; Habits:', habits)Output:
Name: John ; Age: 16 ; Habits: FootballUse the format() function
Syntax:
format(value[, format_spec])
Parameters:
- value: value to be formatted.
- format_spec: format you want to use for ‘value’.
The format() method returns the formatted result of a given value specified by the specified formatting.
Example:
- Use the format() function to format two strings through pattern: {:3s}, which has the effect of formatting the string.
firstStr = 'Hello'
secondStr = 'This is a lesson in Python tutorials.'
# Use the format() method to insert variables into a string.
print('{:3s}! {:3s}'.format(firstStr, secondStr))Output:
Hello! This is a lesson in Python tutorials.Use f-string
Syntax:
f'a{value:pattern}b'
Parameters:
- f character: use the string f to format the string.
- a,b: characters to format.
- {value:pattern}: string elements need to be formatted.
- pattern: string format.
Example:
firstStr = 'Hello'
secondStr = 'This is a lesson in Python tutorials.'
# Use the f-string to insert variables into a string.
print(f'{firstStr}! {secondStr}')Output:
Hello! This is a lesson in Python tutorials.Use % formatting
This type of formatting is familiar once you’ve been exposed to the C language.
Syntax:
<string>% (1st value, 2nd value, ….)
Example:
firstStr = 'Hello'
# Use % formatting
newStr = ('%s! This is a lesson in Python tutorials.' % (firstStr))
print('New string:', newStr)Output:
New string: Hello! This is a lesson in Python tutorials.Summary
The article insert variables into a String in Python would like to stop here. I hope you found a method that works for you if you don’t have any ideas. Use the format() function, which is relatively easy to understand and implement. Or an f-string is also a good choice, depending on your case, which way is reasonable to use. If you have any suggestions or comments about the article, please comment.
My name is Jason Wilson, you can call me Jason. My major is information technology, and I am proficient in C++, Python, and Java. I hope my writings are useful to you while you study programming languages.
Name of the university: HHAU
Major: IT
Programming Languages: C++, Python, Java
