let Vs. var
Till now in this course we have been using let keyword to declare variables. let was added in ES6(ECMAScript 2015)….
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this keyword
What is this? this is a keyword in javascript and many other programming languages. this has different meanings in different…
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Error Handling
Errors Many times there arises an error during program execution due to invalid input, programming mistakes/errors etc. Suppose you are…
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document object
Document Object Model A Document Object Model commonly referred as DOM is the organization of elements in a web page….
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Data Types
Data types refer to the type of data that can be stored in a variable. Till now, we learnt how…
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for-in loop
A for–in loop is used to iterate over an object or an array. A javascript object consists of a collection…
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While loop
A while loop is created using while keyword followed by a condition and a set of statements that are executed…
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For Loop
What is a loop? Suppose you want to do an action more than once such as printing a message 10…
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Functions
A function is a block of code or a set of statements which has a name and performs some task….