String

⇒ Strings

• Strings in Kotlin are represented by the type String- Generally, a string value is a sequence of characters in double quotes ( " "):

val str = "123"

• Strings are immutable. Once you initialize a string, you can't change its value or assign a new value to it.

• All operations that transform strings return their results in a new String object, leaving the original string unchanged:

• Elements of a string are characters that you can access via the indexing operation: s[i].

• You can iterate over these characters with a for loop:

fun main() {
	val str = "abcd"
	for (c in str) {
	println(c)
	}
}

• An array of characters is called a string.

•  Kotlin strings are mostly similar to Java strings but has some new added functionalities.

• Kotlin strings are also immutable in nature means we can not change elements and length of the String.

var variable_name = "Hello, Geeks"
or
var variable_name : String = "GeeksforGeeks"

var variable_name = String()

1. Using index: Returns the character at specified index.

2. Using get function: Returns the character at specified index passed as argument to get function.

3. Iterating over the String: Using loops to access the characters in the String.

Some important properties and functions in String:

• Length: Returns the length of the String. 

var s =" String"
println(s.length)

• get(index): Returns the character at that particular index. 

s.get(3) // Output: - i

• subSequence(start, end):Returns a substring starting from start and ending at end but excluding end. 

s.subSequence(1, 4) // Output: - tri

• str.compareTo(string): Returns 0 if str == string. 

fun main(args: Array<String>) {

var g = "GeeksForGeeks"
var e = "Geeks"
println(g.length)
println(g.get(4))
println(g.subSequence(0, 5))
println(g.compareTo(e)

}

String literals –

1. Escaped String

• \” : for double quote

• \r : for carriage return

• \n : for newline

• \’ : for single quote

• \\ : for backslash

• \t : for tab

• \b : for backspace

2. Raw String – Multi-line String

fun main(args: Array<String>) {
// raw string - multiline string
	var str = """My
		|name
		|is
		|Yash
	""".trimMargin()
	println(str)
}

• Structural Equality –

• Referential Equality –