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Looping in
Javascript
https://www.aptuz.com
Introduction
Looping is a fundamental concept in programming,
and JavaScript, as one of the most widely used
languages on the web, has undergone significant
changes in how it handles loops over the years. Join us
on this journey as we explore the transition from
traditional looping structures to the modern, more
efficient ES5 techniques. By the end of this
presentation, you'll have a clear understanding of how
JavaScript's looping capabilities have evolved and how
to leverage these improvements in your code.
Traditional Loops
Traditional looping mechanisms have
been an integral part of JavaScript since
its inception. These loops are
fundamental for repeating tasks and
executing code multiple times.
The most commonly used traditional
loop in JavaScript is the 'for' loop. It
follows a structured syntax that includes
initialization, condition, and
incrementation.
Arrays are fundamental data structures used to
store collections of values.
To perform various operations on array
elements, we need efficient ways to iterate
through them.
Array Iteration
The traditional 'for' loop is
one way to iterate
through arrays.
The 'for...in' Loop
The 'for...in' loop is an iteration
method in JavaScript.
It is primarily used for iterating over
the properties of objects.
This loop doesn't rely on index values
as in traditional 'for' loops.
Instead, it iterates through the keys
(property names) of an object.
Syntax:
The 'variable' represents the current
property name during each iteration.
The 'object' is the object you want to
iterate over.
These methods provide more elegant and efficient ways to iterate
through arrays.
ES5 Looping Methods
forEach() Method:
some() Method:
every() Method:
map() Method:
Thank You
https://www.aptuz.com/
info@aptuz.com
4th Floor, RAM SVR, Madhapur,
HITEC City, Hyderabad -
500081
+(91)-9491754728
Aptuz Technologies

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Looping in Javascript.pdf

  • 2. Introduction Looping is a fundamental concept in programming, and JavaScript, as one of the most widely used languages on the web, has undergone significant changes in how it handles loops over the years. Join us on this journey as we explore the transition from traditional looping structures to the modern, more efficient ES5 techniques. By the end of this presentation, you'll have a clear understanding of how JavaScript's looping capabilities have evolved and how to leverage these improvements in your code.
  • 3. Traditional Loops Traditional looping mechanisms have been an integral part of JavaScript since its inception. These loops are fundamental for repeating tasks and executing code multiple times. The most commonly used traditional loop in JavaScript is the 'for' loop. It follows a structured syntax that includes initialization, condition, and incrementation.
  • 4. Arrays are fundamental data structures used to store collections of values. To perform various operations on array elements, we need efficient ways to iterate through them. Array Iteration The traditional 'for' loop is one way to iterate through arrays.
  • 5. The 'for...in' Loop The 'for...in' loop is an iteration method in JavaScript. It is primarily used for iterating over the properties of objects. This loop doesn't rely on index values as in traditional 'for' loops. Instead, it iterates through the keys (property names) of an object. Syntax: The 'variable' represents the current property name during each iteration. The 'object' is the object you want to iterate over.
  • 6. These methods provide more elegant and efficient ways to iterate through arrays. ES5 Looping Methods forEach() Method: some() Method: every() Method: map() Method:
  • 7. Thank You https://www.aptuz.com/ info@aptuz.com 4th Floor, RAM SVR, Madhapur, HITEC City, Hyderabad - 500081 +(91)-9491754728 Aptuz Technologies