![JS Break Statement
The break statement terminates the current loop, switch, or label statement and
transfers program control to the statement following the terminated statement.
The break statement "jumps out" of a loop.
The break statement used to "jump out" of a switch() statement.
The break statement breaks the loop and continues executing the code after the
loop
Syntax
break [label];
*label Optional.](https://image.slidesharecdn.com/jspresentation-160831150156/85/Javascript-Break-statement-type-conversion-regular-expression-3-320.jpg)
![Regex
RegEx Pattern
A regular expression pattern is composed of simple characters, such as /abc/, or a
combination of simple and special characters, such as /ab*c/ or /sss(d+).d*/.
Special characters in regular expressions.
/, ^, $, *, +, ., ?, w, [], n, (x), (x|y)
Example:
Executes a search:
var myRe = /d(b+)d/g;
var myArray = myRe.exec("cdbbdbsbz"); // returns an array
Search and Replace:
var re = /(w+)s(w+)/;
var str = "John Smith";
var newstr = str.replace(re, "$2, $1");
console.log(newstr);](https://image.slidesharecdn.com/jspresentation-160831150156/85/Javascript-Break-statement-type-conversion-regular-expression-7-320.jpg)
Javascript - Break statement, type conversion, regular expression
- 1. JavaScript “Break, Type conversion, RegEx" Shivam Gupta ( Full Stack Web Developer ) +91-9711626192
- 2. Overview JS Break Type Conversion RegEx.
- 3. JS Break Statement The break statement terminates the current loop, switch, or label statement and transfers program control to the statement following the terminated statement. The break statement "jumps out" of a loop. The break statement used to "jump out" of a switch() statement. The break statement breaks the loop and continues executing the code after the loop Syntax break [label]; *label Optional.
- 4. Break Statement Example The break statement with loop. Example for (i = 0; i < 10; i++) { if (i === 3) { break; } text += "The number is " + i + "<br>"; } The break statement with switch var Animal = 'Giraffe'; switch (Animal) { case 'Cow': case 'Giraffe': case 'Dog': case 'Pig': console.log('This animal will go on Noah's Ark.'); break; case 'Dinosaur': default: console.log('This animal will not.'); }
- 5. Type Conversion Type conversion is converting one type of data to another type. JavaScript variables can be converted to a new variable and another data type: By the use of a JavaScript function Automatically by JavaScript itself Number() converts to a Number, String() converts to a String, Boolean() converts to a Boolean. Example: Converting Strings to Numbers: Number("3.14") Converting Booleans to Strings: String(false) Numbers to Strings: String(123)
- 6. RegEx Regular expressions are used to perform pattern-matching and "search-and- replace" functions on text. In JavaScript, regular expressions are also objects. Regex syntax /pattern/modifiers; Creating a regular expression var re = /pattern/modifiers ; or var re = new RegExp(”pattern”, ”modifiers”) Modifiers i, g, m Regex Object Methods exec, test, match, search, replace, split
- 7. Regex RegEx Pattern A regular expression pattern is composed of simple characters, such as /abc/, or a combination of simple and special characters, such as /ab*c/ or /sss(d+).d*/. Special characters in regular expressions. /, ^, $, *, +, ., ?, w, [], n, (x), (x|y) Example: Executes a search: var myRe = /d(b+)d/g; var myArray = myRe.exec("cdbbdbsbz"); // returns an array Search and Replace: var re = /(w+)s(w+)/; var str = "John Smith"; var newstr = str.replace(re, "$2, $1"); console.log(newstr);
- 8. Thank you