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The Commandments of Javascript (and How They Influence Your Career)
Hey Folks, this blog is all about basic commands of Javascript. Before proceeding further, I suggest you have some knowledge about ‘What is Javascript?’ and ‘What role does javascript play in Web development?’.
Let’s begin our journey with our first topic:
Values and Variables:
A value is a piece of data, so it’s the most fundamental unit of information that we have in programming. This text “Jonas” is a value. To see this value in the console, we need to log this value into the console using console.log( ). For example, console.log (“Jonas”);
We can store values into variables by using let. For example: let firstName = “Jonas”; here, we assign a value “Jonas” into a variable named firstName. To see the value of this variable, we log this variable into the console. For example: console.log ( firstName );
A variable name cannot start with a number and uppercase letter. Variable only contain numbers, letters, underscore (_), or the dollar ($) sign. For example: let first_Name = “Jonas”; or let name1 = “Jonas”;
Primitive Data Types:
There are seven primitive data types in Javascript.
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Number: Floating point numbers are used for decimals and integers. For example: let age = 23;
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String: Sequence of characters used for text. For example: let firstName = “Jonas”;
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Boolean: Logical type that can only be true or false when used for making decisions. For example: let fullAge = true;
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Undefined: Value has been taken by a variable that is not yet defined (‘empty value’). For example: let children;
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Null: It also means ‘empty value.’
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Symbol: Value that is unique and cannot be changed.
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BigInt: Larger integers than the Number type can hold.
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Basic Operators:
An operator allows us to transform or combine multiple values and do all kinds of work with matters.
1.Arithmetic Operators: Arithmetic operators are used to perform arithmetic on numbers.
5.Type Operator: Returns the type of a variable.
This was all about the basic commands of JavaScript.
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Wednesday, Apr 6, 2022