What does %s mean in a Python format string?

In a Python format string, the %s placeholder represents a string. It is used to indicate that a string should be inserted at that position in the final string.

Here's an example of how you can use the %s placeholder in a format string:

Use the %s placeholder in a format string

name = 'John'
age = 30

# Use the %s placeholder to insert a string into the final string
output = 'My name is %s and I am %s years old' % (name, age)

print(output)  # Output: 'My name is John and I am 30 years old'

The %s placeholder automatically converts any argument to a string, so you can insert integers, floats, or other objects directly without manual conversion.

For example:

Use the %s placeholder with non-string types

value = 42

# Insert the number directly; %s automatically converts it to a string
output = 'The value is %s' % value

print(output)  # Output: 'The value is 42'