Convert Python String to Float datatype

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Let us see how to convert a string object into a float object. We can do this by using these functions :

float()
decimal()

Method 1: Using float()

# declaring a string 
str1 = "9.02"
print("The initial string : " + str1) 
print(type(str1))  
  
# converting into float 
str2 = float(str1) 
print("\nThe conversion of string to float is ", str2) 
print(type(str2))  
  
# performing an operation on the float variable 
str2 = str2 + 1
print("The converted string to float is incremented by 1 : ", str2) 

Output :

The initial string : 9.02
<type 'str'>

The conversion of string to float is  9.02
<type 'float'>
The converted string to float is incremented by 1 :  10.02

Method 2: Using decimal() : Since we only want a string with a number with decimal values this method can also be used.

# importing the module 
from decimal import Decimal 
  
# declaring a string 
str1 = "9.02"
print("The initial string : " + str1) 
print(type(str1))  
  
# converting into float 
str2 = Decimal(str1) 
print("\nThe conversion of string to float is ", str2) 
print(type(str2))  
  
# performing an operation on the float variable 
str2 = str2 + 1
print("The converted string to float is incremented by 1 : ", str2) 

Output :

The initial string : 9.02
<type 'str'>

The conversion of string to float is  9.02
<type 'float'>
The converted string to float is incremented by 1 :  10.02