Write a program to print Hello World!.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
document.write("Hello World!");
</script>
</body>
</html>Try it Yourself »
Write a program to add two numbers.
Solution:
<!DOCTYPE html>
<html>
<body>
<p>A typical addition operation adds two numbers and produces a new number.</p>
<script>
var x ;
var y;
var z;
x =100;
y = 200;
z = x+ y;
document.write(" The sum of two numbers is: " + z);
</script>
</body>
</html>
Try it Yourself »
Write a program to subtract two numbers.
Solution:
<!DOCTYPE html>
<html>
<body>
<p>A typical subtraction operation subtracts two numbers and produces a new number.</p>
<script>
var x ;
var y;
var z;
x=300;
y = 200;
z = x-y;
document.write(" The difference of two numbers is: " + z);
</script>
</body>
</html>
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Write a program to divide two numbers.
Solution:
<!DOCTYPE html>
<html>
<body>
<p>A typical division operation divides two numbers and produces a new number.</p>
<script>
var x ;
var y;
var z;
x=300;
y = 200;
z = x/y;
document.write(" The division of two numbers is: " + z);
</script>
</body>
</html>
Try it Yourself »
Write a program to multiply two numbers.
Solution:
<!DOCTYPE html>
<html>
<body>
<p> A typical multiplication operation multiplies two numbers and produces a new number.</p>
<script>
var x ;
var y;
var z;
x=300;
y = 200;
z = x* y;
document.write(" The multiplication of two numbers is: " + z);
</script>
</body>
</html>Try it Yourself »
Write a program to find the area of a circle.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var r ;
var area;
r=3;
area = 3.14* r* r;
document.write(" The area of the circle is: " + area +" centimeter square");
</script>
</body>
</html>
Try it Yourself »
Write a program to find the square root of a number.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var x ;
var z;
x=4;
z = Math.sqrt(x);
document.write(" The square root of a number z is: " + z);
</script>
</body>
</html>
Try it Yourself »
Write a program to find the cube root of a number.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var x ;
var z;
x=4;
z = Math.cbrt(x);
document.write(" The cube root of a number z is: " + z);
</script>
</body>
</html>
Try it Yourself »
Write a program to round off a number.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var x ;
var z;
x=4.5;
z = Math.round(x);
document.write(" The round off a number z is: " + z);
</script>
</body>
</html>
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Write a program to find the incremented and decremented values of two numbers.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var x ;
var y;
var z;
var p;
var a;
var b;
x=4;
y=6;
z=x+1;
p=x-1;
a = y+1;
b= y-1;
document.write(" The incremented value of x is: " + z);
document.write(" The decremented value of x is: " + p);
document.write(" The incremented value of y is: " + a);
document.write(" The decremented value of y is: " + b);
</script>
</body>
</html>
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Write a program to find the greatest of two numbers using if – else statement.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var x ;
var y;
x=4;
y=6;
if(x>y){
document.write(" x is greater than y");
} else {
document.write(" y is greater than x");
}
</script>
</body>
</html>Try it Yourself »
Write a program to print the first ten natural numbers using for loop statement.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var i ;
for (i=1; i<=10; i++)
document.write("" + i);
</script>
</body>
</html>
Try it Yourself »
Write a program to print the first ten natural numbers using while loop statement.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var i=1 ;
while (i<=10)
document.write("" + i++);
</script>
</body>
</html>
Try it Yourself »
Write a program to print the first nine natural numbers using do while loop statement.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var i=1 ;
do{
document.write("" + i++);
} while (i<10)
</script>
</body>
</html>
Try it Yourself »
Write a program to print the average of the first 10 numbers using for loop statement.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var i, avg, sum = 0;
for( i=1; i<=10; i++)
sum = sum + i;
avg = sum/10;
document.write("<br> sum of the first 10 numbers = </br>" + sum);
document.write("<br> average of the first10 numbers = </br>" + avg);
</script>
</body>
</html>
Try it Yourself »
Write a program to add two numbers using JavaScript function.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function addition(a, b) {
return a + b;
}
document.write("" + addition(4, 3));
</script>
</body>
</html>
Try it Yourself »
Write a program to display the current date and time.
Solution:
<!DOCTYPE html>
<html>
<body>
<button type="button"
onclick="document.getElementById('demo').innerHTML = Date()">
Click me to display Date and Time.</button>
<p id="demo"></p>
</body>
</html>
Try it Yourself »
Write a program to find the area of a triangle where lengths of the three of its sides are 5, 6, 7.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var side1 = 5;
var side2 = 6;
var side3 = 7;
var s = (side1 + side2 + side3)/2;
var area = Math.sqrt(s*((s-side1)*(s-side2)*(s-side3)));
document.write(area);
</script>
</body>
</html>
Try it Yourself »
Write a program to convert temperature from fahrenheit to celsius.
Solution:
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
function toCelsius(f) {
return (5/9) * (f-32);
}
document.getElementById("demo").innerHTML = toCelsius(77);
</script>
</body>
</html>
Try it Yourself »
Write a program to get the website URL (loading page).
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
alert(document.URL);
</script>
</body>
</html>Try it Yourself »
Write a program to reverse a given string.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function string_reverse(str)
{
return str.split("").reverse().join("");
}
document.write(string_reverse("JavaScript"));
</script>
</body>
</html>
Try it Yourself »
Write a program to count the number of vowels in a given string.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function vowel_Count(str)
{
return str.replace(/[^aeiou]/g, "").length;
}
document.write(vowel_Count("Python"));
</script>
</body>
</html>
Try it Yourself »
Write a program to find sum of array elements.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
var num = [1,2,3,4]
var sum = 0;
for(var i = 0; i < num.length; i++){
sum += num[i]
}
document.write(sum);
</script>
</body>
</html>Try it Yourself »
Write a program to create the dot products of two given 3D vectors.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function dot_product(vector1, vector2) {
var result = 0;
for (var i = 0; i < 3; i++) {
result += vector1[i] * vector2[i];
}
return result;
}
document.write(dot_product([1,2,3], [1,2,3]))
</script>
</body>
</html>
Try it Yourself »
Write a program to find the number of even digits in a given integer.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function even_digits(num) {
var ctr = 0;
while (num) {
ctr += num % 2 === 0;
num = Math.floor(num / 10);
}
return ctr;
}
document.write(even_digits(124));
</script>
</body>
</html>
Try it Yourself »
Write a program to change the capitalization of all letters in a given string.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function change_case(txt) {
var str1 = "";
for (var i = 0; i < txt.length; i++) {
if (/[A-Z]/.test(txt[i])) str1 += txt[i].toLowerCase();
else str1 += txt[i].toUpperCase();
}
return str1;
}
document.write(change_case("germany"));
</script>
</body>
</html>
Try it Yourself »
Write a program to remove all characters from a given string that appear more than once.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function remove_duplicate_cchars(str) {
var arr_char = str.split("");
var result_arr = [];
for (var i = 0; i < arr_char.length; i++) {
if (str.indexOf(arr_char[i]) === str.lastIndexOf(arr_char[i]))
result_arr.push(arr_char[i]);
}
return result_arr.join("");
}
document.write(remove_duplicate_cchars("abcdabc"));
</script>
</body>
</html>
Try it Yourself »
Write a program to sort an array of all prime numbers between 1 and a given integer.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function sort_prime(num) {
var prime_num1 = [],
prime_num2 = [];
for (var i = 0; i <= num; i++) {
prime_num2.push(true);
}
for (var i = 2; i <= num; i++) {
if (prime_num2[i]) {
prime_num1.push(i);
for (var j = 1; i * j <= num; j++) {
prime_num2[i * j] = false;
}
}
}
return prime_num1;
}
document.write(sort_prime(11));
</script>
</body>
</html>
Try it Yourself »
Write a program to check whether there is at least one element which occurs in two given sorted arrays of integers.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function check_common_element(arra1, arra2) {
for (var i = 0; i < arra1.length; i++)
{
if (arra2.indexOf(arra1[i]) != -1)
return true;
}
return false;
}
document.write(check_common_element([1,2,3], [3,4,5]));
</script>
</body>
</html>
Try it Yourself »
Write a program to find the maximum difference between any two adjacent elements of a given array of integers.
Solution:
<!DOCTYPE html>
<html>
<body>
<script>
function max_difference(arr) {
var max = -1;
var temp;
for (var i = 0; i < arr.length - 1; i++)
{
temp = Math.abs(arr[i] - arr[i + 1]);
max = Math.max(max, temp);
}
return max;
}
document.write(max_difference([1, 2, 3, 8, 9]));
</script>
</body>
</html>
Try it Yourself »
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