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Typecasting in Python

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Typecasting, also known as type conversion or coercion, refers to the process of converting one data type into another. In Python, typecasting is commonly used to change the data type of variables. There are mainly two types of typecasting, they are:

1. Implicit Type Conversion:

Python automatically converts data types in certain situations, such as when performing operations involving different types. For example, adding an integer to a float results in a float.


x = 10
y = 5.5
result = x + y  # result will be a float (10 + 5.5 = 15.5)
print(result)   # output 15.5

2. Explicit Type Conversion:

int(): Converts a value to an integer.

float_number = 3.14
int_number = int(float_number)  # int_number will be 3
print(float_number) # output 3.14
print(int_number)   # output 3

float(): Converts a value to a floating-point number.

integer_number = 5
float_number = float(integer_number)  # float_number will be 5.0
print(integer_number) # output 5
print(float_number)   # output 5.0

str(): Converts a value to a string.

number = 42
string_number = str(number)  # string_number will be '42'

bool(): Converts a value to a boolean.

zero = 0
nonzero = 10
bool_zero = bool(zero)  # bool_zero will be False
bool_nonzero = bool(nonzero)  # bool_nonzero will be True
print(bool_zero) # prints False
print(bool_nonzero) # prints True

list(): Converts a sequence (e.g., tuple, string) to a list.

tuple_data = (1, 2, 3)
list_data = list(tuple_data)  # list_data will be [1, 2, 3]
print(tuple_data) # prints (1, 2, 3)
print(list_data)  # prints [1, 2, 3]

tuple(): Converts a sequence (e.g., list, string) to a tuple.

list_data = [1, 2, 3]
tuple_data = tuple(list_data)  # tuple_data will be (1, 2, 3)
print(list_data) # prints [1, 2, 3]
print(tuple_data) # prints (1, 2, 3)

set(): Converts a sequence (e.g., list, tuple, string) to a set.

string_data = "hello"
set_data = set(string_data)  # set_data will be {'h', 'e', 'l', 'o'}
print(set_data)  # prints {'h', 'e', 'l', 'l', 'o'}

dict(): Converts a sequence of key-value pairs (e.g., list of tuples) to a dictionary.

list_of_tuples = [('a', 1), ('b', 2), ('c', 3)]
dictionary_data = dict(list_of_tuples)  # dictionary_data will be {'a': 1, 'b': 2, 'c': 3}
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