Javascript Strings Homework

Javascript Popcorn Hack

%%javascript

let fullName = "Meryl Chen";   // <-- Add your full name

// Extract first name (characters before the space)
let spaceIndex = fullName.indexOf(" ");
let firstName = fullName.substring(0, spaceIndex);   // <-- Change the numbers to get the first name correctly

// Extract last name (characters after the space)
let lastName = fullName.substring(spaceIndex + 1);   // <-- Change this to get the last name correctly

// Print results
console.log("First: " + firstName);
console.log("Last: " + lastName);

<IPython.core.display.Javascript object>

Javascript Strings Homework

Task – Password Strength Checker

Write a JavaScript program that asks the user to enter a password (use prompt() in the browser).

Your program should check for these rules using string methods:

The password must be at least 8 characters long.
It must include the word “!” somewhere.
It must not start with a space “ “.
Print out one of these messages depending on the input:

“Strong password” if all rules are met.
“Weak password: too short” if less than 8 characters.
“Weak password: missing !” if it doesn’t include “!”.
“Weak password: cannot start with space” if it starts with a space.

%%js

// Example Username Checker
let username = prompt("Enter your username:");

// Rule 1: Must be at least 5 characters
if (username.length < 5) {
    console.log("Invalid username: too short");
}
// Rule 2: Cannot contain spaces
else if (username.includes(" ")) {
    console.log("Invalid username: no spaces allowed");
}
// Rule 3: Must start with a capital letter
else if (username[0] !== username[0].toUpperCase()) {
    console.log("Invalid username: must start with a capital letter");
}
// All rules passed
else {
    console.log("Valid username");
}

<IPython.core.display.Javascript object>

%%javascript
// Password Strength Checker

let password = prompt("Enter your password:");

// Handle if user presses cancel
if (password === null) {
  console.log("No password entered.");
}
// Rule 1: Must be at least 8 characters long
else if (password.length < 8) {
  console.log("Weak password: too short");
}
// Rule 2: Must include "!"
else if (!password.includes("!")) {
  console.log("Weak password: missing !");
}
// Rule 3: Must not start with space
else if (password.startsWith(" ")) {
  console.log("Weak password: cannot start with space");
}
// All rules passed
else {
  console.log("Strong password");
}

<IPython.core.display.Javascript object>