length

String length (number of characters)

Example: JavaScript
var myText= "Hello";
var myLength = myText.length;
// myLength = 5

toUpperCase

convert text to uppercase
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Example: JavaScript
var myText = "Hello";
myText = myText.toUpperCase();
// myText = "HELLO"

toLowerCase

convert text to lowercase
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Example: JavaScript
var myText = "Hello";
myText = myText.toLowerCase();
// myText = "hello"

replace

replace one line with another
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Example 1: JavaScript
var myText = "Hello World, World, World";
myText = myText.replace("World", "AAA");
// myText = "Hello AAA, World, World"

Example 2: JavaScript
var myText = "Hello World, World, World";
myText = myText.replace(new RegExp("World","g"), "AAA");
// myText = "Hello AAA, AAA, AAA"

split

split a row into substrings by separator
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Example: JavaScript
var myText = "Hello Good morning!";
var arrText = myText.split(" ");
// arrText[0] = "Hello"
// arrText[1] = "Good"
// arrText[2] = "morning!"

charAt

get a symbol by position
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Example: JavaScript
var myText = "Hello, Good morning!";
var symbol = myText.charAt(4);
// symbol = o

substr

returns a substring starting from a position pos and length len
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Example: JavaScript
var myText = "Hello, Good morning!";
var str = myText.substr(3, 2);
// str = lo

slice
(works just like it does substring)

returns a substring starting from a position pos1 before pos2 (not including pos2)
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Example: JavaScript
var myText = "Hello, Good morning!";
var str = myText.slice(3, 5);
// str = lo

substring
(works just like it does slice)

returns a substring starting from a position pos1 before pos2 (not including pos2)
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Example: JavaScript
var myText = "Hello, Good morning!";
var str = myText.substring(3, 5);
// str = lo

indexOf

searches for a substring and returns an index
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Example: JavaScript
var myText = "Hello Good morning!";
var pos = myText.indexOf("Good");
// pos = 6

startsWith

Checks, whether the line begins with the specified substring?
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Example 1: JavaScript
var myText = "Hello, Good morning! ";
var isStart = myText.startsWith("Hello");
// isStart = true

Example 2: JavaScript
var myText = "Hello, Good morning! ";
var isStart = myText.startsWith("hello");
// isStart = false

trim

remove spaces at the beginning and end of a line
Learn more...

Example: JavaScript
var myText = " Hello, Good morning! ";
var str = myText.trim();
// str = "Hello, Good morning!"