# Parse a string to float in Python (float() function)

Python float() function example: Here, we are going to learn how to convert a given string value to the float value in Python? By IncludeHelp Last updated : December 17, 2023

## Prerequisites

To understand this example, you should know the following Python topics:

## Problem statement

Given a string value (that contains float value) and we have to convert it into float value in Python.

Example:

```Input:
str = "10.23"
print(float(str))
Output:
10.23

Input:
str = "1001"
print(float(str))
Output:
1001.0
```

## Parsing a string to a float value

To parse a string value to a float value in Python, use the float() method, which is a library function in python, it is used to convert a given string or integer value to the float value.

Below is the syntax of float() method:

```float(string_value/integer_value)
```

## Python program to parse a string to a float value

```# python code to demonstrate example of
# float() function

str1 = "10.23"
str2 = "1001"

# printing str1 & str2 types
print("type of str1: ", type(str1))
print("type of str2: ", type(str2))

# converting to float value
val1 = float(str1)
val2 = float(str2)

# printing types and values of val1 & val2
print("type of val1: ", type(val1))
print("type of val2: ", type(val2))

print("val1 = ", val1)
print("val2 = ", val2)
```

### Output

The output of the above example is:

```type of str1:  <class 'str'>
type of str2:  <class 'str'>
type of val1:  <class 'float'>
type of val2:  <class 'float'>
val1 =  10.23
val2 =  1001.0
```

## Parsing a string input to the float

Generally, when we take input using the input() method, it returns a string value. To parse the string input to the float, use the input() method inside the float() method.

Remember, the input should be either a float or an int value.

## Python program to parse a string input to the float

```# Input and parse a float value

value = float(input("Input a float value : "))

# Printing the type and value
print("Type of the value is :", type(value))
print("And, the value is :", value)
```

### Output

The output of the above example is:

```RUN 1:
Input a float value : 12.34
Type of the value is : <class 'float'>
And, the value is : 12.34

RUN 2:
Input a float value : 108
Type of the value is : <class 'float'>
And, the value is : 108.0

RUN 3:
Input a float value : 108Hello
Traceback (most recent call last):
File "/home/main.py", line 3, in <module>
value = float(input("Input a float value : "))
ValueError: could not convert string to float: '108Hello'
```