ISCL Lab3
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Perform encryption and Decryption of Caesar cipher. Write a script for performing these operations
<html>
<head>
<script>
function encrypt(text, s)
{
let result="";
for (let i = 0; i < text.length; i++)
{
let char = text[i];
let ch = String.fromCharCode(char.charCodeAt() + s);
result += ch;
}
return result;
}
function dencrypt(text, s)
{
let result=""
for (let i = 0; i < text.length; i++)
{
let char = text[i];
let ch = String.fromCharCode(char.charCodeAt() -s);
result += ch;
}
return result;
}
// Driver code
let text = "HORRIBLE";
let s = 4;
document.write("Text : " + text + "<br>");
document.write("Shift : " + s + "<br>");
document.write("Cipher: " + encrypt(text, s) + "<br>");
let text1 = encrypt(text, s);
document.write("Text1 : " + text1 + "<br>");
document.write("Shift : " + s + "<br>");
document.write("Cipher: " + dencrypt(text1, s) + "<br>");
</script>
</head>
</html>
