# 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.

**Improve this sample solution and post your code through Disqus**

**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

**Shorten an array using its length property**

A great way of shortening an array is by redefining its length property.

let array = [0, 1, 2, 3, 4, 5, 6, 6, 8, 9] array.length = 4 // Result: [0, 1, 2, 3]

Important to know though is that this is a destructive way of changing the array. This means you lose all the other values that used to be in the array.

Ref: https://bit.ly/2LBj213

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