Part 1 / Logic / Else blocks

Since the two conditions — if user.loggedIn and if !user.loggedIn — are mutually exclusive, we can simplify this component slightly by using an else block:

{#if user.loggedIn}
	<button on:click={toggle}>
		Log out
	</button>
{:else}
	<button on:click={toggle}>
		Log in
	</button>
{/if}

A # character always indicates a block opening tag. A / character always indicates a block closing tag. A : character, as in {:else}, indicates a block continuation tag. Don't worry — you've already learned almost all the syntax Svelte adds to HTML.