JavaScript String
JavaScript Tutorial » JavaScript String
A string are used for storing and manipulating a sequence of letters, numbers, special characters and arithmetic values or combination of all
Strings can be created by enclosing the string within single quotes (') or double quotes (").
Example:
<script>
var my_String = 'Have a good day'; // Single quoted
var my_String = "Have a good day"; // Double quoted
</script>
var my_String = 'Have a good day'; // Single quoted
var my_String = "Have a good day"; // Double quoted
</script>
You can use quotes inside a string, as long as they don't match the quotes surrounding the string:
Example:
<script>
var my_str1 = "it's done";
var my_str2 = 'He said "Have a good day"';
var my_str3 = "She replied 'Have a good day to you too'";
var my_str4 = 'Have a good day"; // Syntax error - quotes must match
</script>
var my_str1 = "it's done";
var my_str2 = 'He said "Have a good day"';
var my_str3 = "She replied 'Have a good day to you too'";
var my_str4 = 'Have a good day"; // Syntax error - quotes must match
</script>
You can use single quotes inside a single quoted strings and double quotes inside double quoted strings as log as the quotes is preceded with a backslash character (\), like this: :
Example: have two methods that add numbers of different type:
<script>
var my_str1 = 'it\'s okay';
var my_str2 = "He said \"Goodbye\"";
var my_str3 = 'She replied \'Calm down, please\'';
</script>
Output:var my_str1 = 'it\'s okay';
var my_str2 = "He said \"Goodbye\"";
var my_str3 = 'She replied \'Calm down, please\'';
</script>
JavaScript Escape Sequences- example
Most commonly used escape sequences>
1. \n is replaced by the newline character
2. \t is replaced by the tab character
3. \r is replaced by the carriage-return character
4. \b is replaced by the backspace character
5. \\ is replaced by a single backslash (\)
Example:
<script>
// Creating variables
var my_str1 = "You will learn programming \n fundamentals and basic \n object-oriented concepts";
document.write("" + my_str1 + ""); // Create line break
var my_str2 = "C:\Programs\Downloads";
document.write(my_str2 + "
"); // Prints C:ProgramsDownloads
var my_str3 = "C:\\Programs\\Downloads";
document.write(my_str3); // Prints C:\Programs\Downloads
</script>
Finding a String Inside Another String - example
You can use the indexOf() method to find a substring or string within another string.
Example:
<script>
var my_str = "Here we learn JavaScript starting from scratch";
var pos = my_str.indexOf("learn");
document.write(pos); // 0utputs: 8
</script>
JavaScript String contains, to int, replace, interpolation, length, split, methods, to json, concatenation, includes.
contains, to int, replace, interpolation, length, split, methods, to json, concatenation, includes.
JavaScript String - javascript tutorial
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