String Data Type

Strings can be formed in ruby using single quotes or double quotes. But ruby treats string with double quotes

Any characters such as number or alphabets or symbols enclosed within quotes are Strings.

String Data Type example in Ruby

We've already learnt about adding newline character to a string. Likewise, other characters can also be embedded in strings.

name = “Bharath\tKumar”
  • \t adds tab space
  • \s adds space

For creating strings, this is an added advantage of using double quotes over single quotes. If you use double quotes, you could use single quote as apostrophe in the string.

str = “Bharath’s”
  • But you cannot use single quote directly inside single quotes.
  • But there is a way to do so, using a special character \ which acts as the escape character, hence telling the compiler/interpreter that the next character has some special meaning, as in case of \n. In other cases, like for apostrophe, the backslash \ tells the compiler/interpreter that the following character has no special meaning and that the following character is to be part of the string.
str = 'Bharath\'s'

Use \' inside double quotation to include apostrophe in string.

In the below image, when using single quote inside single quotes you can see that we aren't able quit the interactive mode. So, it's not advisable.

Including apostrophe in a String by using escape characters in Ruby


HERE Keyword :

To create a multiline string and store it in a variable HERE keyword is used.

Here keyword example in Ruby


This begins with a two less than symbols << and the keyword HERE indicates that, until you see the keyword HERE again, store all the values in the variable.

quote = << HERE
		What you do
		today can
		improve
		all your
		tomorrows
		HERE

So, the value What you do\ntoday can\nimprove\nall your\ntomorrows is stored in the variable quote. This is the easiest way to store large fragments of text in the variable.


Split method :

Split is a useful method for taking the string and splitting into parts. Its syntax is :

<String Value>.split(<DELIMITER>)

Where, the delimiter is the point from where the Stirng specified will be split into two.

Split method in String data type in Ruby

first,last = "Bharath,Kumar".split(/,/)

Here comma (,) is the delimiter. We use slashes (/) to delimit(escape) the delimiters.

When this statement is executed, the piece of text before comma is assigned to the variable first and the piece of text after comma is assigned to the variable last.

Therefore in the picture above, value Bharath is assigned to the variable first and value Kumar is assigned to the variable last.


Squeeze method :

Squeeze is used to remove trailing spaces from the string. Following is the syntax for it :

<String Value>.squeeze

Squeeze method in String data type in Ruby

In the above image, you could note the number of spaces in the variable first. When printing the first variable using squeeze method it removes the trailing spaces.