Question

In: Computer Science

Write the below code to use HTML and JavaScript. 1. a) Write a JavaScript program to...

Write the below code to use HTML and JavaScript.

1.

a) Write a JavaScript program to display the current day and time.
b) Write a JavaScript program to print the contents of the current window.

c) Write a JavaScript program where the program takes a random integer between 1 to 10
d) Write a JavaScript program to calculate multiplication and division of two numbers (input from the user).
e)Write a JavaScript program to create a new string from a given string changing the position of first and last characters. The string length must be greater than or equal to 1.
f)Write a JavaScript program to check whether a string starts with 'Java' and false otherwise

Expert Solution

Answer 1) The answer for subparts is below: I have answered 4 subparts

(A) The HTML and javascript code is below.

<head>
<title>
displaying current date and time
</title>
</head>

<body>
<script>

// creating a date object
var todayDate = new Date();

var todayDay = todayDate.getDay();

// Array of days.
var weekday = ['Sunday', 'Monday', 'Tuesday',
'Wednesday', 'Thursday', 'Friday', 'Saturday'
];

// displaying date and time
document.write("Today is : " + weekday[todayDay]);
document.write("<br/>");

// getting hour from date object
var hours = todayDate.getHours();
var am_pm = hours >= 12 ? 'PM' : 'AM';

hours = hours % 12;

// when we get hours=0 from 12 % 12 = 0 from above then set hour to 12 ie noon 12
hours = hours ? hours : 12;
var minutes = todayDate.getMinutes();
minutes = minutes < 10 ? '0' + minutes : minutes;

var myTime = hours + " " + am_pm + " : " + minutes ;
document.write("\tCurrent time is : " + myTime);
</script>
</body>

</html>

OUTPUT SCREENSHOT

(B) The Code is below:

<!DOCTYPE html>
<html>
<head>
<title>Print the content current window.</title>
</head>

<body>
<p> Window.print() method is used to print the content.</p>
<p>Click the button to print the current page.</p>
<button onclick="print_current_page()">Print this page</button>

</script>
</body>

</html>

OUTPUT SCREENSHOT

(C) The Code is below:

<html>
<head>
<title>Radom number</title>
</head>
<body>

</script>

</body>
</html>

(D) The Code is below.

<html>
<head>
<title>Radom number</title>
</head>
<body>

<form onsubmit="return false;">
Enter First number: <br>
<input type="number" id="fnum" name="number1"> <br>
Enter Second number: <br>
<input type="number" id="snum" name="number2"> <br> <br>

<button onclick="multiply()">multiply</button>
<button onclick="divide()">division</button>

</form>

// function for division.
function divide(){
var num1 = document.getElementById("fnum").value;
var num2 = document.getElementById("snum").value;
document.getElementById('result').innerHTML= "Result of divide: "+ num1/num2;
}

</script>

</body>
</html>

venereology answered 8 months ago

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