A crash course on Typecasting and Type conversion in Python in a very non-verbose manner
The process of converting one data type to another data type is called Typecasting or Type Coercion or Type Conversion.
The topics that I’ll be focusing on in this article are:
When the type conversion is performed automatically by the interpreter without the programmer’s intervention, that type of conversion is referred to as implicit type conversion.
myInt = 143 # Integer value. myFloat = 1.43 # Float value.
myResult = myInt + myFloat # Sum result
print("datatype of myInt:",type(myInt))
print("datatype of myFloat:",type(myFloat))
print("Value of myResult:",myResult)
print("datatype of myResult:",type(myResult))
The output for the above program will be:
datatype of myInt: <class 'int'>
datatype of myFloat: <class 'float'>
Value of myResult: 144.43
datatype of myResult: <class 'float'>
In the above program,
integer, the datatype of myFloat is a
floatdata type because Python converts smaller data type to larger data type to avoid the loss of data.
This type of conversion is called Implicit Type conversion (or) UpCasting.
In Explicit Type Conversion, users convert the data type of an object to the required data type. We use predefined in-built functions like:
The syntax for explicit type conversion is:
This type of conversion is called Explicit Type conversion (or) DownCasting.
We can use this function to convert values from other types to int.
ValueError: invalid literal for int() with base 10: '10.5'
ValueError: invalid literal for int() with base 10: 'ten'
ValueError: invalid literal for int() with base 10: '0B1111'
TypeError: can't convert complex to int
This function is used to convert any data type to a floating point number.
ValueError: could not convert string to float: 'ten'
TypeError: can't convert complex to float
ValueError: could not convert string to float: '0B1111'
This functionis used to convert real numbers to a complex (real, imaginary) number.
You can use this function to convert a single value to a complex number with real part x and imaginary part 0.
ValueError: complex() arg is a malformed string
If you want to convert X and Y into complex number such that X will be real part and Y will be imaginary part.
>>> complex(True, False)
This function is used to convert any data type to boolean data type easily. It is the most flexible data type in Python.
Note: With the help of bool function, you can convert any type of datatype into boolean and the output will be - For all values it will produce True except 0, 0+0j and for an Empty String.
This function is used to convert any type into a string type.
integer_number = 123 # Int
string_number = "456" # String
print("Data type of integer_number:",type(integer_number))
print("Data type of num_str before Type Casting:",type(num_str))
string_number = int(string_number)
print("Data type of string_number after Type Casting:",type(string_number))
number_sum = integer_number + string_number
print("Sum of integer_number and num_str:",number_sum)
print("Data type of the sum:",type(number_sum))
When we run the above program the output will be:
Data type of integer_number: <class 'int'>
Data type of num_str before Type Casting: <class 'str'>
Data type of string_number after Type Casting: <class 'int'>
Sum of integer_number and num_str: 579
Data type of the sum: <class 'int'>
In the above program,
int()function to perform addition.
I covered pretty much everything that is required to perform any type of typecasting operation in Python3.
Hope this helped you learn about Python Typecasting in a quick and easy way.
If you liked this article please click on the clap and leave me your valuable feedback.
Originally published by PALAKOLLU SRI MANIKANTA at https://medium.freecodecamp.org
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