mấy huynh xin tư vấn cho em là em viết thế này mà ko chạy hix:
<html>
<head>
<script language = "javascript">
var number_1 = parseInt (prompt ("Enter number_1"));
var number_2 = parseInt (prompt ("Enter number_2"));
var integer_code = parseInt (prompt ("Enter integer_code"));
if (integer_code ==1)
{
sum = number_1 + number_2;
}
if (integer_code ==2);
if (number_1>number_2);
{
difference = number_1 - number_2;
}
else
{
difference = number_1 - number_2;
}
if (integer_code ==3);
{
product = number_1 * number_2;
}
if (integer_code ==4)
if (number_2 ==0)
{
alert ("error message");
}
else
{
quotient = number_1 / number_2;
}
alert (" sum = " +sum);
alert (" difference = " +difference);
alert (" product = " +product);
alert (" quotient = " +quotient);
</script>
</head>
</html>
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