Type Casting

Type casting:

Converting from one data type to another data type.

There are two types:

1.       implicit type casting

2.       Explicit type casting

Explicit type casting:

Explicit type casting is done by the programmer.

Example:

>>> int(123.67)

123

>>> int(10+5j) #Error

>>> int(True) #Converting from Bool to integer

1

>>> float(10) #converting from int to float

10.0

>>> float(True)

1.0

>>> float(3+4j) # can't convert complex data type to float

output: Error

TypeError: can't convert complex to float

>>> 

int(a) # Error bcoz complex data types type casted to int

c=”123” # here c is str data type

int(c) # here str to int converted

Note:

1.        We can convert from any data type to int or float except complex type.

2.        Whenever we are trying to convert str data type to int/float, it is mandatory str should be either int/float literal.

Ex:

>>> a="123"

>>> int(a)

123

>>> b="10.5"

>>> float(b)

10.5

>>> 

Complex()

>>> complex(10)

(10+0j)

>>> complex(10.4)

(10.4+0j)

>>> complex("hel")

Traceback (most recent call last):

  File "<pyshell#2>", line 1, in <module>

    complex("hel")

ValueError: complex() arg is a malformed string

>>> complex(True)

(1+0j)

a=123.456 # a is float variable

int(a) #now data is converted   #from float to integer.

b=True

int(b) or int(True)

#1

c=False

int(c) -> 0 displays

a=2+3j

int(a) # Error bcoz complex data types type casted to int

c=”123” # here c is str data type

int(c) # here str to int converted

complex(x,y):
We can use this method to convert x and y into complex form such that x will be real part and y will be imaginary part.
Ex:
complex(10,-2) -->10-2j
complex(True,False)-->1+0j

Bool()

Converting from other data types into bool type.

Ex:

bool(0)àFalse

bool(1)->True

bool(“”)->False

>>> bool("True")

True

>>> bool("False")

True

>>> bool(False)

False

>>> bool(10-3j) # Non Zero

True

>>> bool(0-0j) # Zero

False

>>> print('python''programming')

pythonprogramming

>>> 

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