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December 30, 2020 13:33
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A simple JS task - choosing a function to calculate
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<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width"> | |
<title>repl.it</title> | |
<link href="style.css" rel="stylesheet" type="text/css" /> | |
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootswatch/4.5.2/cosmo/bootstrap.min.css" integrity="sha384-5QFXyVb+lrCzdN228VS3HmzpiE7ZVwLQtkt+0d9W43LQMzz4HBnnqvVxKg6O+04d" | |
crossorigin="anonymous"> | |
<script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" | |
crossorigin="anonymous"> | |
</script> | |
<script src="https://polyfill.io/v3/polyfill.min.js?features=es6"> | |
</script> | |
<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3.0.1/es5/tex-mml-chtml.js"> | |
</script> | |
</head> | |
<body> | |
<div class="container"> | |
<br> | |
<h1>Choose a formula to calculate:</h1> | |
<form class="form"> | |
<div class="form-check"> | |
<input type="radio" id="var1" name="variant" value="1" class="form-check-input"/> | |
<label for="var1" class="form-check-label">\(F = x + 2y\)</label> | |
</div> | |
<div class="form-check"> | |
<input type="radio" id="var2" name="variant" value="2" class="form-check-input"/> | |
<label for="var2" class="form-check-label">\(F = 2x - 3y^2\)</label> | |
</div> | |
<div class="form-check"> | |
<input type="radio" id="var3" name="variant" value="3" class="form-check-input"/> | |
<label for="var3" class="form-check-label">\(F = (1- x^2)/y^3\)</label> | |
</div> | |
<div class="form-check"> | |
<input type="radio" id="var4" name="variant" value="4" class="form-check-input"/> | |
<label for="var4" class="form-check-label">\(F = 2x + 3y - z\)</label> | |
</div> | |
<hr> | |
<input type="button" value="Calculate" class="btn btn-primary" onClick="calculation()"> | |
</form> | |
<div id="result" class="alert alert-primary" role="alert" style="display:none;"> | |
Result is... | |
</div> | |
</div> | |
<script language="JavaScript" src="script.js"></script> | |
</body> | |
</html> |
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function calculation() { | |
var x= 12; | |
var y= 5; | |
var z = 2; | |
var result; | |
var variant = 0; | |
variant = $('input[name=variant]:checked').val(); | |
switch (variant){ | |
case "1": | |
result=x + 2*y; | |
break; | |
case "2": | |
result=2*x - 3*y*y; | |
break; | |
case "3": | |
result=(1- x^2)/(y*y*y); | |
break; | |
case "4": | |
result=2*x + 3*y - z; | |
break; | |
default: | |
// alert ("Error! Select a formula first!"); | |
$("#result").html("Error! Select a formula first!"); | |
$("#result").removeClass("alert-primary"); | |
$("#result").addClass("alert-danger"); | |
$("#result").show(); | |
return; | |
} | |
$("#result").removeClass("alert-danger"); | |
$("#result").addClass("alert-primary"); | |
$("#result").html("x = "+x+", y = "+y+", z = "+z+"<br>"+ | |
"Variant <strong>"+variant+"</strong> choosen! Result is: <strong>"+result+"</strong>"); | |
$("#result").show(); | |
//alert(result); | |
} |
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label{ | |
margin-top:4px; | |
} |
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