Data Type Conversion
Learn about conversions between different data types in Python.
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Conversions between data types
There are several different data types available in Python. Sometimes, you might come across a scenario where you need to perform conversions from one data type to another.
In Python, conversions between types can be made by using its built-in functions, a few of which are mentioned below.
| Conversion Function | Description | Example |
|---|---|---|
float() |
Converts the element passed to a floating-point number | float(123), float("123") = 123.0 |
int() |
Converts the element passed to an integer | int(56.78), int("56") = 56 |
str() |
Converts the element passed to a string | str(123) = “123” |
In Python, the built-in type() function can be used to check the data type of variables.
Using this, let’s look at a few examples to get a better grasp of these built-in functions.
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float_var = 56.78 # Float variableint_var = 123 # Integer variablestr_var = "123.2" # String variableres_int = int(float_var) # Converting float to integerprint(res_int)print("Type: ", type(res_int)) # Checking type of res_intres_str = str(float_var) # Converting float to stringprint(res_str)print("Type: ", type(res_str)) # Checking type of res_strres_ftr = float(str_var) # Converting string to floatprint(res_ftr)print("Type: ", type(res_ftr)) # Checking type of res_ftr
Although not its main functionality, the round() function can also be used to convert data types. For example, round(56.78) returns 57. Over here, the floating-point number is rounded to the nearest integer.
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## Using round() for converting data types# Note, the 0 represents the number of decimals you want the number to be rounded off to.float_var = 56.78print(round(float_var, 0)) # We don't want any decimal numbers over here.