How to Check if String contains only Numeric Digits in Ruby - Step by Step Examples

How to Check if String contains only Numeric Digits in Ruby ?

Answer

To check if a string contains only numeric digits in Ruby, you can use regular expressions or methods like 'match' to check for numeric patterns in the string.

✐ Examples

1 Check if String contains only Numeric Digits using regular expressions

In this example,

We create a function 'contains_only_numeric_digits' that takes a string as input.
We use a regular expression pattern '\A\d+\z' to match only numeric digits in the string.
If the entire string matches the pattern, 'true' is returned; otherwise, 'false'.
Finally, we print the result.

Ruby Program

def contains_only_numeric_digits(str)
  !!str.match(/^\d+$/)
end

str = '12345'
all_digits = contains_only_numeric_digits(str)
puts 'String contains only numeric digits:', all_digits

Output

String contains only numeric digits:
true

Summary

In this tutorial, we learned How to Check if String contains only Numeric Digits in Ruby language with well detailed examples.

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