I am trying to create a function based on user input. What am I doing with my Code?
Question
My goal is to get user input for different variables and then use the input to create an equation. The equation should read like this U1= 2*((DM/2)(D2)) ; U2= D1/ (DS/2); U3= (U1-U2) ; U4 = (D2-D1); U= (U3/U4).
Do I have to do document.getelementbyId tag or is there an another way.
<html>
<head>
<script>
var DM
DM = prompt ("Moon's Diameter");
var DE
DE = prompt ("Earth's Diameter");
var DS
DS = prompt ("Sun's Diameter");
var D1
D1 = prompt ("Distance from Earth to the Moon");
var D2
D2= prompt ("Distance from Sun to the Moon");
function umbra() {
var U1 = (2*((DM/2) * (D2));
return (U1);
var U2 = (D1)*(DS/2);
return (U2);
var U3= U1-U2;
return (U3);
var U4 = (D2-D1);
return (U4)
var U = (U3/U4)
return (U)
}
document.write(umbra)
</script>
</head>
<body>
</body>
</html>
1 answers
solution1
0 2017-11-18 02:23:00
Creat a little Web page, Use HTML input fields, let the user type their numbers, create a "Calculate" button, and display the result on click in a read-only input field.
Consider using jQuery. It makes things easier.
There's a bizillion calculators on the net that work like this. Google "volume calc" "mortgage calc" "auto calc" etc for examples.
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