move around

1-js/02-first-steps/11-logical-operators/9-check-login/solution.md

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+
+
+```js run demo
+let userName = prompt("Who's there?", '');
+
+if (userName == 'Admin') {
+
+  let pass = prompt('Password?', '');
+
+  if (pass == 'TheMaster') {
+    alert( 'Welcome!' );
+  } else if (pass == '' || pass == null) {
+    alert( 'Canceled.' );
+  } else {
+    alert( 'Wrong password' );
+  }
+
+} else if (userName == '' || userName == null) {
+  alert( 'Canceled' );
+} else {
+  alert( "I don't know you" );
+}
+```
+
+Note the vertical indents inside the `if` blocks. They are technically not required, but make the code more readable.

1-js/02-first-steps/11-logical-operators/9-check-login/task.md

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+importance: 3
+
+---
+
+# Check the login
+
+Write the code which asks for a login with `prompt`.
+
+If the visitor enters `"Admin"`, then `prompt` for a password, if the input is an empty line or `key:Esc` -- show "Canceled.", if it's another string -- then show "I don't know you".
+
+The password is checked as follows:
+
+- If it equals "TheMaster", then show "Welcome!",
+- Another string -- show "Wrong password",
+- For an empty string or cancelled input, show "Canceled."
+
+The schema:
+
+![](ifelse_task.png)
+
+Please use nested `if` blocks. Mind the overall readability of the code.
+
+Hint:  passing an empty input to a prompt returns an empty string `''`. Pressing `key:ESC` during a prompt returns `null`.
+
+[demo]