Convert String to Double in Python3

• Last Updated : 08 Oct, 2021

Given a string and our task is to convert it in double. Since double datatype allows a number to have non -integer values. So conversion of string to  double is the same as the conversion of string to float

This can be implemented in these two ways

1) Using float() method

Python3

 str1 = "9.02"print("This is the initial string: " + str1) # Converting to doublestr2 = float(str1)print("The conversion of string to double is", str2) str2 = str2+1print("The converted string to double is incremented by 1:", str2)

Output:

This is the initial string: 9.02
The conversion of string to double is 9.02
The converted string to double is incremented by 1: 10.02

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

Python3

 from decimal import Decimal  str1 = "9.02"print("This is the initial string: " + str1) # Converting to doublestr2 = Decimal(str1)print("The conversion of string to double is", str2) str2 = str2+1print("The converted string to double is incremented by 1:", str2)

Output:

This is the initial string: 9.02
The conversion of string to double is 9.02
The converted string to double is incremented by 1: 10.02
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