Learning JavaScript tutorial – JavaScript break, continue and Labels

JavaScript break statement

JavaScript break is a loop control statement. Break statements are commonly found inside the loop body; break helps us to control the execution of a loop. JavaScript Break statement (break keyword) may be used to break the flow and exits out of the loop structures of while loop, do-while loop, for loop, if condition and switch statement.

There are certain conditions when we need to break out of a loop before the complete loop gets executed. Or, in some cases we want to break out of the loop because there may be chances of an error. With the execution of the break statement, program flow will resume to the next sequential statement following the loop.

JavaScript break statement is an integral part of a switch case statement.
Break brings control out, as the statements in the switch case executed. If the break statement were omitted from switch case, the interpreter would execute each and every statement in all the switch case structures.

<script type="text/javascript" language="javascript" >
var x = prompt("Write a number in between 1 to 4");
switch (x)
{
  case "1": alert(‘x is 1′);
          break;
  case "2": alert(‘x is 2′);
          break;
  case "3": alert(‘x is 3′);
          break;
  case "4": alert(‘x is 4′);
          break;
  default: alert(‘x is not 1, 2, 3 or 4′);
}
</script>

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Online Business – an idea which can deliver a wealth!

Today, we are living in a global village. This is because of the internet… internet is not other than a network of networks which allows us to get in touch with each other in a fraction of second. Internet acts as a house of information and opens door for new business ideas. Success stories of Google, Facebook, eBay or Amazon empower us with the power of Online Business. Here we are going to discuss how to implement a strategy to start a new online business with your creative idea.

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Learning JavaScript tutorial – JavaScript for (loop) Statement

JavaScript for loop is on of the most commonly used loop statement which provides a looping construct that is often more convenient than the while loop statement. JavaScript for loop statement allows you to repeat a section of code a certain number of times; changing values of variable counter by increment or decrement it each time the code is executed.

JavaScript for loop is the most compact form of looping which includes for loop initialization, for loop test case statement, and loop control statement all in one line. The JavaScript for loop statement initialise variable counter at the start of the execution of the loop. Then it checks if the expression evaluates to true, then only for loop statement execute the body of the loop; means the piece of code between the curly brackets and change the value of variable counter by increment or decrement it. For loop perform some action on a piece of code till the test case condition statement is satisfied or evaluate true.

JavaScript for loop statement Syntax

for (loop initialization, loop test case statement, loop control statement)
{
  statement block executed while conditional expression
  evaluates to true(satisfied).
}

Here, If the resulting value of test case conditional expression is true or it is evaluated true, for loop execute statement block enclosed within the Curly braces – {} and new value of variable counter is calculated.

for loop statement flowchart

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Learning JavaScript tutorial – JavaScript while(loop), do…while(Loop) statement

JavaScript while statement

In JavaScript, while loop statement allows us to perform some action on a piece of code till the condition is satisfied or true. The JavaScript while loop statement check condition at the start of the execution of the loop. If the expression evaluates to true, the while loop statement execute the body of the loop; means the piece of code between the curly brackets.

JavaScript while statement Syntax

while(conditional expression is true)
{
  statement block executed while conditional expression
  evaluates to true(satisfied).
}

Here, If the resulting value of conditional expression is true or it evaluated to true, while loop statement block enclosed within the Curly braces – {} is executed.

do while loop statement flowchart

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Review – C.J. Date’s SQL and Relational Theory Master Class- How to Write Accurate SQL Code

C.J. Date's SQL and Relational Theory Master Class

Simple and Clean presentation. I really appreciate the way he has used to introduce complex sql logic in the simpler way. To start with this video you must have the basic understanding of SQL. In this tutorial we start from the ground and moves towards the excel our logic to design a robust and maintainable database.

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