Simple Lightning Web Component

LWC:

1. <template>  
2.   
3.     Hello World  
4.   
5. </template>  

Lightning Component:

1. <aura:component implements="force:appHostable">  
2.   
3.     <article class="slds-card">  
4.   
5.         <c:sample/>  
6.            
7.     </article>  
8.   
9. </aura:component>   

Output:

Create a Lightning component tab to view the output.