July 16, 2019
Concatenation Operator in Python
In Python + is used as concatenation operator. By default, Python supports string concatenation using + operator. And if you try to concatenate string and integer using + operator, it will trow some runtime error.
Example
Let’s try to concatenate string and integer using + operator.
1 2 3 | message = "Hello and welcome to GelCode " number = 100 print(message + number) |
Result
1 2 3 4 | print(message + number) TypeError: can only concatenate str (not "int") to str Process finished with exit code 1 |
So how to concatenate string and integer in Python? There are various ways to do this, below I have listed few methods.
Method 1: Using str() function
Convert the integer to string type in print function using str() function.
1 2 3 | message = "Hello and welcome to GelCode " num = 100 print(message + str(num)) |
Output
1 | Hello and welcome to GelCode 100 |
Method 2: Using f-strings
1 2 3 | message = "Hello and welcome to GelCode " number = 100 print(f'{message}{number}') |
Output
1 | Hello and welcome to GelCode 100 |
You can also use string directly with f-strings. See below example.
1 2 3 | brand = "GelCode " number = 100 print(f'{"Hello and welcome to "}{brand}{number}') |
Output
1 | Hello and welcome to GelCode 100 |
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