Which operator is used to concatenate two strings in Python?

In Python, the + operator is used to concatenate two strings. Concatenation joins two strings end-to-end to create a new string. This operator is widely used for creating messages, building dynamic strings, or combining user inputs.

greeting = "Hello, " + "world!"
# greeting now contains "Hello, world!"

String concatenation is a fundamental operation when working with text data. Python makes it easy to combine strings using the + operator, which is both intuitive and efficient.

Be careful when using the + operator, as it only works with strings. Attempting to concatenate a string with another data type, like an integer, will result in a TypeError unless the non-string value is explicitly converted to a string.