Created
July 19, 2019 02:34
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JS Bin // source https://jsbin.com/sivahof
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width"> | |
<title>JS Bin</title> | |
</head> | |
<body> | |
<form> | |
<div class="form-group"> | |
<label>จำนวนไฟฟ้าที่ใช้</label> | |
<input type="text" id="elect" value="50"> | |
หน่วย | |
</div> | |
<div class="form-group"> | |
<label>ค่าไฟฟ้าหน่วยละ</label> | |
<input type="text" id="unit" value="10"> | |
บาท | |
</div> | |
<button type="button" onclick="calElect()">คำนวณค่าไฟฟ้า</button> | |
</form> | |
<div> | |
จำนวนไฟฟ้าที่ใช้ = 50 หน่วย | |
</div> | |
<div> | |
ค่าไฟฟ้าหน่วยละ = 10 บาท | |
</div> | |
<div> | |
รวมเป็นเงิน = 525 บาท | |
</div> | |
<script id="jsbin-javascript"> | |
function calElect() { | |
var elect = document.getElementById("elect").value; | |
var unit = document.getElementById("unit").value; | |
var elect_next = 0; // ค่าไฟฟ้าอัตราก้าวหน้า | |
var elect_price = 0; // ค่าไฟฟ้า | |
var elect_price_total = 0; // ค่าไฟฟ้ารวม | |
if(elect < 40){ | |
elect_next = 2; | |
}else if(elect <= 100){ | |
elect_next = 5; | |
}else { | |
elect_next = 10; | |
} | |
elect_price = elect * unit; | |
elect_price_total = elect_price + (unit * elect_next); | |
// console.log(elect_price, elect_price_total); | |
alert("" + elect_price_total); | |
} | |
</script> | |
<script id="jsbin-source-javascript" type="text/javascript">function calElect() { | |
var elect = document.getElementById("elect").value; | |
var unit = document.getElementById("unit").value; | |
var elect_next = 0; // ค่าไฟฟ้าอัตราก้าวหน้า | |
var elect_price = 0; // ค่าไฟฟ้า | |
var elect_price_total = 0; // ค่าไฟฟ้ารวม | |
if(elect < 40){ | |
elect_next = 2; | |
}else if(elect <= 100){ | |
elect_next = 5; | |
}else { | |
elect_next = 10; | |
} | |
elect_price = elect * unit; | |
elect_price_total = elect_price + (unit * elect_next); | |
// console.log(elect_price, elect_price_total); | |
alert("" + elect_price_total); | |
}</script></body> | |
</html> |
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function calElect() { | |
var elect = document.getElementById("elect").value; | |
var unit = document.getElementById("unit").value; | |
var elect_next = 0; // ค่าไฟฟ้าอัตราก้าวหน้า | |
var elect_price = 0; // ค่าไฟฟ้า | |
var elect_price_total = 0; // ค่าไฟฟ้ารวม | |
if(elect < 40){ | |
elect_next = 2; | |
}else if(elect <= 100){ | |
elect_next = 5; | |
}else { | |
elect_next = 10; | |
} | |
elect_price = elect * unit; | |
elect_price_total = elect_price + (unit * elect_next); | |
// console.log(elect_price, elect_price_total); | |
alert("" + elect_price_total); | |
} |
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