JavaScript: Convert an amount to coins
JavaScript Function: Exercise-14 with Solution
Write a JavaScript function to convert an amount to coins.
Sample function : amountTocoins(46, [25, 10, 5, 2, 1])
Here 46 is the amount. and 25, 10, 5, 2, 1 are coins.
Output : 25, 10, 10, 1
Sample Solution: -
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Write a JavaScript function to convert an amount to coins.</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function amountTocoins(amount, coins)
{
if (amount === 0)
{
return [];
}
else
{
if (amount >= coins[0])
{
left = (amount - coins[0]);
return [coins[0]].concat( amountTocoins(left, coins) );
}
else
{
coins.shift();
return amountTocoins(amount, coins);
}
}
}
console.log(amountTocoins(46, [25, 10, 5, 2,1]));
Sample Output:
[25,10,10,1]
Flowchart:

Live Demo:
See the Pen JavaScript - Convert an amount to coins-function-ex- 14 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript function to compute the factors of a positive integer.
Next: Write a JavaScript function to compute the value of bn where n is the exponent and b is the bases.
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JavaScript: Tips of the Day
How to check whether a string contains a substring in JavaScript?
ECMAScript 6 introduced String.prototype.includes:
const string = "foo"; const substring = "oo"; console.log(string.includes(substring));
includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:
var string = "foo"; var substring = "oo"; console.log(string.indexOf(substring) !== -1);
Ref: https://bit.ly/3fFFgZv
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