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Created August 26, 2016 21:19
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Variables Describing variables in detail. // source http://jsbin.com/bixeloc
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="Describing variables in detail.">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Variables</title>
</head>
<body>
<script id="jsbin-javascript">
/*
1. Variables are sort of metaphorically like defining a character
with whom your program, the author, is going to play. Variables
are for storing the definition of something in memory. When you
declare a variable you are basically creating a tool for your
program to hold on to and be able to work with, and naming that tool.
They can be many different types of things, including a number, a string,
a boolean, a function, etc. They're called variable because they are
changeable throughout the program.
2. To declare a variable you use the term "var", then the name (or ID) of
the variable, then and equals sign, and then the content of that variable,
whatever it may be. The ID of a variable should be in camel case, which
means that the first letter should be lower case, and if the ID has multiple
words, any words after the first should begin with a capital letter.
*/
"use strict";
var currentMood = "stymied";
/*
3. Variables can perform many tasks as tools, but only if we incorporate them in
some way in the program. For example, if we console.log (this "logs" to console,
or prints out) a variable, and have declared it correctly, the variable will
then appear in our console. If we call a variable as the input of a function,
then the variable will pass through the function, and participate in that
function based on its commands.
*/
function brendan(mood) {
if (mood === "stymied") {
console.log("Have a beer");
} else if (mood === "bored") {
console.log("Do some coding");
} else {
console.log("What you smokin");
}
}
brendan(currentMood);
/*
4. Multiple variable declarations and the necessity of deliberate "var"s
There are three types of prefixes used to declare a variable: var, const, and let. Var is
the old standard. A variable can be redefined later in the program, as long as it's not a "const," and no prefix is
required for declaring a variable. For example:
*/
var brendan2 = "galoot";
console.log(brendan2);
var jeremiahReligion = "amish";
console.log("What religion is Jeremiah? Well, he's" + " " + jeremiahReligion);
var marmaduke = "conqueror";
console.log(marmaduke);
marmaduke = "terrible conqueror";
console.log(marmaduke);
/*
It is very important to think about how you are declaring variables, as each way has
its own attributes that can make your program behave differently. For one example, if
you are attempting a for loop or any other sort of variable inside of a function, and you
do "i = 0" or "terra = form", that is, if you forget to include "var" or another prefix,
this makes your new variable global, and can mess with your whole plan. In such a case,
it's crucial to include a prefix.
*/
</script>
<script id="jsbin-source-javascript" type="text/javascript">/*
1. Variables are sort of metaphorically like defining a character
with whom your program, the author, is going to play. Variables
are for storing the definition of something in memory. When you
declare a variable you are basically creating a tool for your
program to hold on to and be able to work with, and naming that tool.
They can be many different types of things, including a number, a string,
a boolean, a function, etc. They're called variable because they are
changeable throughout the program.
2. To declare a variable you use the term "var", then the name (or ID) of
the variable, then and equals sign, and then the content of that variable,
whatever it may be. The ID of a variable should be in camel case, which
means that the first letter should be lower case, and if the ID has multiple
words, any words after the first should begin with a capital letter.
*/
var currentMood = "stymied";
/*
3. Variables can perform many tasks as tools, but only if we incorporate them in
some way in the program. For example, if we console.log (this "logs" to console,
or prints out) a variable, and have declared it correctly, the variable will
then appear in our console. If we call a variable as the input of a function,
then the variable will pass through the function, and participate in that
function based on its commands.
*/
function brendan(mood) {
if (mood === "stymied") {
console.log("Have a beer")
}
else if (mood === "bored") {
console.log("Do some coding")
}
else {
console.log("What you smokin")
}
}
brendan(currentMood);
/*
4. Multiple variable declarations and the necessity of deliberate "var"s
There are three types of prefixes used to declare a variable: var, const, and let. Var is
the old standard. A variable can be redefined later in the program, as long as it's not a "const," and no prefix is
required for declaring a variable. For example:
*/
var brendan2 = "galoot";
console.log(brendan2);
const jeremiahReligion = "amish";
console.log("What religion is Jeremiah? Well, he's" + " " + jeremiahReligion);
let marmaduke = "conqueror";
console.log(marmaduke);
marmaduke = "terrible conqueror";
console.log(marmaduke);
/*
It is very important to think about how you are declaring variables, as each way has
its own attributes that can make your program behave differently. For one example, if
you are attempting a for loop or any other sort of variable inside of a function, and you
do "i = 0" or "terra = form", that is, if you forget to include "var" or another prefix,
this makes your new variable global, and can mess with your whole plan. In such a case,
it's crucial to include a prefix.
*/
</script></body>
</html>
Raw
jsbin.bixeloc.js
/*
1. Variables are sort of metaphorically like defining a character
with whom your program, the author, is going to play. Variables
are for storing the definition of something in memory. When you
declare a variable you are basically creating a tool for your
program to hold on to and be able to work with, and naming that tool.
They can be many different types of things, including a number, a string,
a boolean, a function, etc. They're called variable because they are
changeable throughout the program.
2. To declare a variable you use the term "var", then the name (or ID) of
the variable, then and equals sign, and then the content of that variable,
whatever it may be. The ID of a variable should be in camel case, which
means that the first letter should be lower case, and if the ID has multiple
words, any words after the first should begin with a capital letter.
*/
"use strict";
var currentMood = "stymied";
/*
3. Variables can perform many tasks as tools, but only if we incorporate them in
some way in the program. For example, if we console.log (this "logs" to console,
or prints out) a variable, and have declared it correctly, the variable will
then appear in our console. If we call a variable as the input of a function,
then the variable will pass through the function, and participate in that
function based on its commands.
*/
function brendan(mood) {
if (mood === "stymied") {
console.log("Have a beer");
} else if (mood === "bored") {
console.log("Do some coding");
} else {
console.log("What you smokin");
}
}
brendan(currentMood);
/*
4. Multiple variable declarations and the necessity of deliberate "var"s
There are three types of prefixes used to declare a variable: var, const, and let. Var is
the old standard. A variable can be redefined later in the program, as long as it's not a "const," and no prefix is
required for declaring a variable. For example:
*/
var brendan2 = "galoot";
console.log(brendan2);
var jeremiahReligion = "amish";
console.log("What religion is Jeremiah? Well, he's" + " " + jeremiahReligion);
var marmaduke = "conqueror";
console.log(marmaduke);
marmaduke = "terrible conqueror";
console.log(marmaduke);
/*
It is very important to think about how you are declaring variables, as each way has
its own attributes that can make your program behave differently. For one example, if
you are attempting a for loop or any other sort of variable inside of a function, and you
do "i = 0" or "terra = form", that is, if you forget to include "var" or another prefix,
this makes your new variable global, and can mess with your whole plan. In such a case,
it's crucial to include a prefix.
*/
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