How Can I Preserve Trailing Zeros When Formatting Numbers to a Specific Number of Decimal Places?

Preserving Decimal Precision in Number Formatting

When formatting numbers to display a specific number of decimal places, it's crucial to handle rounding correctly to avoid misrepresentation.

The provided code parseFloat(num).toFixed(2); attempts to fix numbers to two decimal places. However, it fails to preserve trailings zeros, resulting in numbers like 1 being displayed as 1 instead of the desired 1.00.

To address this issue, we can utilize the following alternative approach:

(Math.round(num * 100) / 100).toFixed(2);

Explanation: This code performs the following steps:

1. Multiplies the number by 100, effectively shifting the decimal point two places to the right.
2. Applies the Math.round function to round the result to the nearest integer.
3. Divides by 100 to restore the original decimal position.
4. Finally, calls the toFixed(2) method to format the number to two decimal places.

This method ensures that numbers are always displayed with two decimal places, preserving trailing zeros when necessary, as illustrated in the provided live demo.

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