sum of 36 and 24 is 60 is 12 <SCRIPT LANGUAGE="JavaScript">
// A program to find the sum and difference of two numbers
var firstNum;
var secondNum;
firstNum = window.prompt('Please enter the first number´´, '');
firstNum = ParseFloat(firstNum);
secondNum = window.prompt('Please enter the second number', '');
secondNum = parseFloat(secondNum);
document.write'The sum of ' + first + ' and ' + secondNum + ' is
' + (firstNum + secondNum) + '<BR>');
document.write('The difference of ' firstNum + ' and ' +
secondNum + ' is ' + (firstNum + secondNum) + <BR>);
</SCRIPT>

Identify as many errors as you can then rewrite the program
correcting the errors.

For each different error you found write a very brief explanation
of what was wrong in the original code

Im totaly confused with javascript

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you need to switch to a '-' on the last line for the difference. Other than that looks ok. I was wondering what output are you getting right now.?

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