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Data types #710

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51fedd4
adding my first helloworlds file
evantwidwell Mar 25, 2020
3166ebc
1st changes to dataypes assignment
evantwidwell Mar 26, 2020
57e6abd
homework week 1 day 1
evantwidwell Mar 31, 2020
ba6e4e6
changes to datatypes
evantwidwell Apr 1, 2020
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74 changes: 74 additions & 0 deletions 01week/datatypes.js
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'Use Strict'

// Write a JavaScript program to display the current day and time

let now = new Date();
console.log("the current date and time is: " + now);

let myButton = document.getElementById("theTime");
myButton.addEventListener('click', function(){
myButton.innerText = now.toString();
});

// Write a JavaScript program to convert a number to a string.

const theNumber = 5;
const theString = theNumber.toString();

console.log(theNumber.toString());
console.log(theNumber);

// Write a JavaScript program to convert a string to the number.

const theOtherString = "4.5";
const theOtherNumber = parseInt(theOtherString, 10);
console.log(theOtherNumber);

// Write a JavaScript program that takes in different datatypes and prints out whether they are a:
// Boolean
const myBool = true;
console.log(typeof myBool);
// Null
const myNull = null;
console.log(typeof myNull);
// Undefined
const myUndefined = undefined;
console.log(typeof myUndefined);
// Number
const myNumber = 3;
console.log(typeof myNumber);
// NaNconst
const myNaN = NaN;
console.log(typeof myNaN);

// String
const myString = 'Joe';
console.log(typeof myString);

// Write a JavaScript program that adds 2 numbers together.
const mySum = 2+3;
console.log(mySum);

let displaySum = document.getElementById("Sum");
displaySum.innerText = mySum.toString();
// Write a JavaScript program that runs only when 2 things are true.
const num1 = true;
const num2 = true;

if(num1&&num2){
console.log('both are true');
};
// Write a JavaScript program that runs when 1 of 2 things are true.
const num3 = true;
const num4 = false;

if(num3||num4){
console.log('one is true');
};
// Write a JavaScript program that runs when both things are not true.
const num5 = false;
const num6 = false;

if(!num5&&!num6){
console.log('both are false');
};
3 changes: 3 additions & 0 deletions 01week/helloworld.js
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'use strict'

console.log("Hello World");
17 changes: 17 additions & 0 deletions 01week/index.html
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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<!-- <div id="display-element"></div>
<button onclick="displayDate()">Click Me</button> -->
<h1>The current date and time is<button id='theTime'> click for date</button>
</h1>
<br>
<h1>The sum of 2 and 3 is: <span id='Sum'></span>
</h1>
</body>
<script src="datatypes.js"></script>
</html>