How do I convert a string to a number in Python?


To convert a string to a number, there are various ways. Let’s see them one by one.

Convert a string to number using int()

Example

In this example, we will convert a string to a number using the int() method −

# String to be converted myStr = "200" # Display the string and it's type print("String = ",myStr) print("Type= ", type(myStr)) # Convert the string to integer using int() and display the type myInt = int(myStr) print("\nInteger = ", myInt) print("Type = ", type(myInt))

Output

String =  200
Type=  <class 'str'>

Integer =  200
Type =  <class 'int'>

Convert a string to number using float()

Example

In this example, we will convert a string to a float using the float() method and then float to integer using the int() method −

# String to be converted myStr = "500" # Display the string and it's type print("String = ",myStr) print("Type= ", type(myStr)) # Convert the string to float myFloat = float(myStr) print("\nFloat = ", myFloat) print("Type = ", type(myFloat)) # Convert the float to int myInt = int(myFloat) print("\nInteger = ", myInt) print("Type = ", type(myInt))

Output

String =  500
Type=  <class 'str'>

Float =  500.0
Type =  <class 'float'>

Integer =  500
Type =  <class 'int'>

Convert a string to number base10 and base8

Example

In this example, we will convert a string to a number using the int() with the base parameter.

# String to be converted myStr = "500" # Display the string and it's type print("String = ",myStr) print("Type= ", type(myStr)) # Convert the string to int myInt1 = int(myStr) print("\nInteger (base10) = ", myInt1) print("Type = ", type(myInt1)) # Convert the string to int myInt2 = int(myStr, base=8) print("\nInteger (base8) = ", myInt2) print("Type = ", type(myInt2))

Output

String =  500
Type=  <class 'str'>
Integer (base10) =  500
Type =  <class 'int'>

Integer (base8) =  320
Type =  <class 'int'>

Updated on: 16-Sep-2022

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