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How to get button to display happy/sad emoji, temp and city?

Could I get some help with this project. it's for shecodes, I need it to ask what city and temp when clicking the button and also add a smile or frowny face if temp above 0 and for below 0. Thanks in advance for the help!

<button>Change city</button>
<script>
  function changeCity() {
    let city = prompt("What city do you live in?");
    let temp = prompt("What temperature is it?");
    
    let h1 = document.querySelector("h1");
    h1.innerHTML = "Currently " + temp + " in " + city + if (temp > 0)
      ("😍") else ("😭") ;
    }

  
  let weatherButton = document.querySelector("button");

  weatherButton.addEventListener("click", changeCity);
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