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I need your help.
I'd like to create a function that would add some zeros in front of a number. The maximum numbers of digits that the total string should have is 6. Here are examples:
9 -> 000009
14 -> 000014
230 -> 000230
1459 -> 001459
21055 -> 021055
987632 -> 987632 (Do nothing, there's already 6 digits)
648
Yes, include the + character, e.g. String. format("%+014.2f", -2.34); .
Keep a sum variable initialized with value zero. Loop through the characters of string and take the sum of all the characters. The sum of all the characters of the string will be the number of 1's, and the number of zeroes will be the (length of string - number of 1's).
There are two main ways to add zeros at the start of an integer number in Java, first by using format() method of String class, and second by using format() method of DecimalFormat class. String.
Works with IE5-11, Firefox, Chrome, etc. Assumes integer input.
function pad(n) { return ("000000" + n).slice(-6); }
Run snippet to test:
<html>
<body>
<input id="stdin" placeholder="enter a number" maxlength="6"><button onclick="test()">Test</button>
<textarea id="stdout" style="width:100%;height:20em;padding:1em;"></textarea>
<script type="text/javascript">
function pad(n) { return ("000000" + n).slice(-6); }
function test() {
var n = parseInt( document.getElementById('stdin').value);
var e = document.getElementById('stdout').innerHTML += n + ' = ' + pad(n) + '\n';
}
</script>
</body>
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