What is difference between float and double in Java?

In Java, float and double are both used to store floating-point numbers, but they differ in precision and storage requirements:

• float:

  • It is a 32-bit single-precision IEEE 754 floating-point number.
  • It provides about 6-7 decimal digits of precision.
  • It has a default value of 0.0f and requires the suffix f or F when declaring float literals.
  • It is used when you want to save memory, especially in large arrays of floating-point numbers.

• double:

  • It is a 64-bit double-precision IEEE 754 floating-point number.
  • It offers about 15-16 decimal digits of precision.
  • Its default value is 0.0d, and the suffix d or D is optional for double literals.
  • It is generally the default choice for decimal values and is used when you need more precision in calculations.

Here's a table summarizing the key differences: