Type Conversion

 

String Slicing

Obtaining a part of a string is called string slicing.

Code

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variable_name[start_index:end_index]

PYTHON

• Start from the 
  start_index
   and stops at 
  end_index
• end_index
   is not included in the slice.

Code

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message = "Hi Ravi"

part = message[3:7]

print(part)

PYTHON

Output

Ravi

Slicing to End

If end index is not specified, slicing stops at the end of the string.

Code

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message = "Hi Ravi"

part = message[3:]

print(part)

PYTHON

Output

Ravi

Slicing from Start

If start index is not specified, slicing starts from the index 0.

Code

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message = "Hi Ravi"

part = message[:2]

print(part)

PYTHON

Output

Hi

Checking Data Type

Check the datatype of the variable or value using

type()

Printing Data Type

Code

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print(type(10))

print(type(4.2))

print(type("Hi"))

PYTHON

Output

<class 'int'>

<class 'float'>

<class 'str'>

Type Conversion

Converting the value of one data type to another data type is called Type Conversion or Type Casting. We can convert

• String to Integer
• Integer to Float
• Float to String and so on.

String to Integer

int()

converts valid data of any type to integer

Code

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a = "5"

a = int(a)

print(type(a))

print(a)

PYTHON

Output

<class 'int'>

5

Invalid Integer Conversion

Code

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a = "Five"

a = int(a)

print(type(a))

PYTHON

Output

ValueError:

invalid literal for int() with base 10: 'Five'

Code

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a = "5.0"

a = int(a)

print(type(a))

PYTHON

Output

invalid literal for int() with base 10: '5.0'

Adding Two Numbers

Code

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a = input()

a = int(a)

b = input()

b = int(b)

result = a + b

print(result)

PYTHON

Input

2

3

Output

5

Integer to String

str()

converts data of any type to a string.

Code

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a = input()

a = int(a)

b = input()

b = int(b)

result = a + b

print("Sum: " + str(result))

PYTHON

Input

2

3

Output

Sum: 5

Summary

1. int()
    -> Converts to integer data type
2. float()
    -> Converts to float data type
3. str()
    -> Converts to string data type
4. bool()
    -> Converts to boolean data type