How to convert string to integer in Ruby

In this tutorial, we are going to learn about how to convert an string to a integer in Ruby.

Converting string to Integer

To convert an string to a integer, we can use the built-in to_i method in Ruby.

The to_i method takes the string as a argument and converts it to number, if a given string is not valid number then it returns 0.

Here is an example, that converts the string "100" to Integer or decimal number:

str = "100"
num = str.to_i

puts num

Output:

100