How to Precisely Format Floats in Java?

How to Format Floats with Specific Precision in Java

Problem:
Need to print a float with precisely two decimal places.

Is System.out.print Sufficient?
No. System.out.print alone cannot format floats with specific precision.

Solution:

To achieve this formatting, utilize the printf method with the proper conversion specifier:

System.out.printf("%.2f", val);

Breakdown:

• %: Start of the format specifier.
• .: Separator between the whole and fractional parts.
• 2: Number of decimal places to include.
• f: Conversion character for a floating-point number.

Additional Conversion Characters:

Beyond floats, Java provides various conversion characters:

• d: Decimal integer
• o: Octal integer
• e: Scientific notation

Example Usage:

To format and print a float named temperature with two decimal places:

System.out.printf("Temperature: %.2f degrees Celsius", temperature);

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