Convert string to integer in Python

In Python an strings can be converted into a integer using the built-in int() function. The int() function takes in any python data type and converts it into a integer.But use of the int() function is not the only way to do so. This type of conversion can also be done using thefloat() keyword, as a float value can be used to compute with integers.

Below is the list of possible ways to convert an integer to string in python:

1. Using int() function

Syntax: int(string)

Example:

num = '10'

  

# check and print type num variable 

print(type(num))  

  

# convert the num into string  

converted_num = int(num) 

  

# print type of converted_num 

print(type(converted_num)) 

  

# We can check by doing some mathematical operations 

print(converted_num + 20) 

As a side note, to convert to float, we can use float() in Python

num = '10.5'

  

# check and print type num variable 

print(type(num))  

  

# convert the num into string  

converted_num = float(num) 

  

# print type of converted_num 

print(type(converted_num)) 

  

# We can check by doing some mathematical operations 

print(converted_num + 20.5) 

2. Using float() function

We first convert to float, then convert float to integer. Obviously the above method is better (directly convert to integer)

Syntax: float(string)

Example:

a = '2'

b = '3'

  

# print the data type of a and b 

print(type(a)) 

print(type(b)) 

  

# convert a using float 

a = float(a) 

  

# convert b using int 

b = int(b) 

  

# sum both integers 

sum = a + b 

  

# as strings and integers can't be added 

# try testing the sum 

print(sum) 

Output:

class 'str'

class 'str'

5.0