const calculateTemp = () => {

const numberTemp = document.getElementById('temp').value;

//console.log(numberTemp);

const tempSelected = document.getElementById('temp_diff');

const valueTemp= temp_diff.options[tempSelected.selectedIndex].value;

const celToFah = (cel) => {

let fahrenheit = Math.round((cel * 9/5) + 32);

return fahrenheit;

}

const fehToCel = (feh) => {

let celcius = Math.round((feh - 32) * 5/9);

return celcius;

}

var result;

if(valueTemp == 'cel'){

result = celToFah(numberTemp);

document.getElementById('result').innerHTML= `= ${result} °Fahrenheit`;

}else{

result = fehToCel(numberTemp);

document.getElementById('result').innerHTML= `= ${result} °Celcius `;

}

}