What is the difference between double and float variables in Java?
 

In java, float takes 4 bytes in memory while Double takes 8 bytes in memory. Float is Single precision floating point decimal number, while Double is double precision decimal number.
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Though both float and double datatype are used to represent floating point numbers in Java, a double data type is more precise than float. A double variable can provide precision up to 15 to 16 decimal points as compared to float precision of 6 to 7 decimal digits.