How Can I Concatenate Strings and Integers in Python?

Concatenating str and int Objects in Python

When attempting to concatenate a str object with an int object in Python, an error message may occur due to the different meanings of the operator for numeric and sequence types. To resolve this issue, explicit conversion is necessary.

Explicit Conversion

# Convert int to str
things = 5
print("You have " + str(things) + " things.")

# Convert str to int (for addition)
total = int('456') + 789

String Formatting

Modern Python implementations offer alternative string formatting options that eliminate the need for multiple operations and provide more control over value representation:

% Interpolation

print("You have %d things." % things)

str.format()

print("You have {} things.".format(things))

F-Strings (Python 3.6 )

print(f"You have {things} things.")

These formatting methods allow for customization, precision control, and better code readability.

Multiple Positional Arguments

Passing multiple positional arguments to print() automatically concatenates them using the sep keyword argument (default: ' '):

print('you have', things, 'things.', sep=' ... ')

While more flexible than explicit conversion, string formatting provides more functionality and control.

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