How Can I Display Decimal Numbers with Optional Precision Using String Format?

Use string format to display decimal numbers with optional precision

When displaying price fields, it is important to determine the precision of decimal places. Sometimes the price may be a whole number, while other times it may contain a decimal component. To handle both cases, we can use the string format method with a custom precision format string.

The built-in format specifiers 0.00 and 0.## provide precise formatting of decimal numbers:

• 0.00: Forces two decimal places to be displayed, regardless of the precision of the entered number.
• 0.##: If there are two decimal places in the input number, display the two decimal places; otherwise, omit.

To specify a format string that only displays the integer part when the number is an integer, we can use a conditional expression:

<code class="language-csharp">var number = 123.46;
var formatString = (number % 1 == 0) ? "0" : "0.00";
var formattedNumber = String.Format("{0:" + formatString + "}", number);</code>

This method sets the format string to "0" or "0.00" depending on whether the input number number is an integer. The formatted number formattedNumber will display the number with appropriate precision according to the format string.

The above is the detailed content of How Can I Display Decimal Numbers with Optional Precision Using String Format?. For more information, please follow other related articles on the PHP Chinese website!