String

• A String is a sequence of characters or symbols with a dynamic length.

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Arithmetic

Operator	Description
+	Concatenation

Info

• Concatenation is the merging of two or more Strings to produce a larger combined String.

• Number can be added to String to produce a new String:

  1 + " Malaysia" is equal to "1 Malaysia"

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Logical comparisons

Operator	Description
==	Equal to
!=	Not equal to

Info

Logical comparisons return a Boolean.

Warning

• String cannot be logically compared with Number. We will need to convert the String to Number or vice versa.

• Ordered comparisons such as > or < do not work for String. For length comparisons, use the length() function to get the String's length which can then be compared numerically.

Example

REPL.IT

Code only

println "abc" == "def"; // false
println "abc" == "abc"; // true
println "abc" + "def";  // "abcdef"
println "abc" + 123;    // "abc123"
println  "abc" - "def"; // Error because Strings cannot be subtracted

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Built-in functions

length

length(String) ➟ Number

• Returns the String's length.

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to_number

to_number(String) ➟ Number

• Converts String to a Number value and returns it

Example

println to_number("3.142"); // 3.142

Warning

Warning

• String must be a valid integer or floating point number. Otherwise, the program halts with this error:

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split

split(source: String, delimiter: String) ➟ Array[String]

• Splits the source into a String Array according to a delimiter and returns the Array

Example

println split("hey, there, whatchu, doing", ",");
// ["hey", "there", "whatchu", "doing"]

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insert

insert(source: String, index: Number, new_value: String) ➟ Array[String]

• Inserts new_value into the source at the index and returns the result

Example

println insert("arna", 2, "ia"); // "ariana"

Warning

• index must be a positive integer and within the length of the array.

• Otherwise, the program halts with either of these errors:

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remove

remove(source: String, index: Number) ➟ String

• Removes a character specified by the index from the source and returns the result

Example

println remove("ariana", 2); // "arana"

Warning

• index must be a positive integer and within the length of the array.

• Otherwise, the program halts with either of these errors:

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to_lowercase

to_lowercase(String) ➟ String

• Returns a lowercased version of the input String

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to_uppercase

to_uppercase(String) ➟ String

• Returns a uppercased version of the input String