Strings are represented by String word.
Strings are immutable. Elements of a string are characters that can be accessed by the indexing operation:
s[i].Strings can be iterated over with a for-loop.
You can concatenate strings using the + operator. This also works for concatenating strings with values of other types, as long as the first element in the expression is a string or character.
You cannot perform a string concatenation operation if a first element in the expression is Number or Boolean.
val s = “Hello” + 1234
val s = “Hello” + 11.14
val s = “Hello” + ‘J’
val s = ‘J’ + “Hello”
val s = “Hello” + true
val s = 1234 + “Hello” //Compile time error.
val s = 43.24 + “Hello” //Compile time error.
val s = true + “Hello” //Compile time error.
- Note that in most cases using string template or raw strings is preferable to string concatenation.
String Literals
Kotlin has two types of string literals:
- Escaped strings
- Raw strings
Escaped String
- Escaped strings — They may have escaped characters in them. The escaped string is very much like a java string.
val s = “Hello World \n”
- Escaping is done in a conventional way, with a backslash.
Raw String
- Raw strings — Raw strings that contain newlines and arbitrary text.
- A raw string delimited by a triple quote (“ ” ”), contains no escaping and you can contain newlines and any other characters:
val text = """ This is a Example
Look How concise it is
That is the magic of kotlin
"""
-
trimMargin()is a recommended way for indentation in a raw string.
val text = """
| Tell me and I forgot.
| Teach me and I remember.
| Involve me and I learn.
| (Benjamin Franklin)
""".trimMargin()
By default
|is used as a margin prefix, but you can choose another character and pass it as a parameter, liketrimMargin(">"). You can also usetrimIndent().If you need to represent a literal
$character in a raw string (which doesn't support backslash escaping), you can use the following syntax:
val price = """
${'$'}9.99
"""
So, guys, that’s it for strings in kotlin. Feel free to let me know if I missed something.
Till then Keep Coding, Keep Loving. Catch you up in another article.
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