3)String Interpolation and Escape Multi-line string

String Interpolation:

String interpolation (or variable interpolation, variable substitution, or variable expansion) is the process of evaluating a string literal containing one or more placeholders, yielding a result in which the placeholders are replaced with their corresponding values.

Note:
Scala provides three string interpolation methods out of the box: s, f and raw.

1)String interpolation to print a variable:

• prefix the s at the beginning of our println statement.
• use the dollar sign $ to refer to our variable.

Example:

2)String interpolation on object properties:

To access the properties inside the object, wrap our expression inside curly braces

Example:

Note:

case class as an alternative to creating Plain Old Java Objects (POJO) but without having to write boilerplate code for getters and setters.

3)String interpolation to evaluate expressions:

String interpolation with expressions by using the curly braces

Example:

4)String interpolation for formatting text

Format your strings by say pre-pending some white spaces in front of the text.

Example:

5)f interpolation to format numbers:

if we wanted to print the 3 decimal places for the cost variable. This can be achieved by using the f interpolator.

Example:

6)Raw interpolation:

The raw String interpolation will allow you to print any symbols within your String

Example:

Escape Characters And Create Multi-line String:

Let's assume JSON string as source

1)escape a Json String using backslash(\):

• print a JSON String by making use of backslash \
• But it does not apply to all the situations , let's assume, if string is too larger, so having backslack typed is bad approach.

Example:

2)escape a Json String using triple quotes(""" """):

Scala's better solution is to have triple quotes instead backslash around the JSON string

Syntax:

"""<YOUR TEXT TO ESCAPE>"""

3)Creating multi-line text using stripMargin:

• To indent text , that is more readable using stripMargin.
• By defualt pipe (|) is the indent, stripMargin allows to specify the different characters as well

stringMargin('#')

Example: with default indent pipe(|):

Example: with custom indent #: