Open In App
Related Articles

Ruby | String index Method

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Report issue
Report
index is a String class method in Ruby which is used to returns the index of the first occurrence of the given substring or pattern (regexp) in the given string. It specifies the position in the string to begin the search if the second parameter is present. It will return nil if not found.
Syntax: str.index() Parameters: Here, str is the given string. Returns: Index of the first occurrence of the given substring or pattern (regexp) in str.
Example 1:
# Ruby program to demonstrate 
# the index method 
       
# Taking a string and 
# using the method
puts "Sample".index('m')           
puts "Program".index('gr')            
puts "Checking".index('a')             

                    
Output:
2
3

Example 2:
# Ruby program to demonstrate 
# the index method 
       
# Taking a string and 
# using the method
puts "Mangal".index(?g)           
puts "Language".index(/[aeiou]/, -3)            

                    
Output:
3
5

Last Updated : 09 Dec, 2019
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads