# 
## Overview
The **`to_f` string method**  converts leading characters in a string to a floating point number. If there is no number character at the leading position in the string, a `0.0` result is returned.

## Syntax
```ruby
str.to_f
```

## Parameters
**`str`**: This is the string whose leading number characters we want to convert to a floating point number.

## Return value
The value returned is a floating point number of the leading number characters present in a string.

## Code example



# create strings
str1 = "234hello"
str2 = "15.4kg"
str3 = "welcome"

# comvert to floatin
# point number
puts str1.to_f;
puts str2.to_f;
puts str3.to_f;


## Explanation
* Line 2 to 4: We create some strings.

* Line 8 to 10: We convert the leading number strings to a floating point number. Then, we print them.

How to convert leading characters of a string to a float in Ruby

Use the `to_f` string method in Ruby to convert leading characters of a string to a float.