Value of Local Storage setItem won't be printed either in getItem or in console.log

JavaScript
3 
localStorage.setItem("first_example") = 1;

Uncaught TypeError: Failed to execute ‘setItem’ on ‘Storage’: 2 arguments required, but only 1 present.
at :1:14

localStorage.setItem{"first_example"} = 1;

Uncaught SyntaxError: Unexpected token ‘{’