What does "double" do in java?

Question

Variables

Answer 1

*Taken from the JAVA lesson:
- double: for floating-point or real numbers with optional decimal points and fractional parts in fixed or scientific notations, such as 3.1416, -55.66.
In other words, it's used for declaring decimal numbers (the ones with dots in between)... You've got examples above.
*Program examples using "double":
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...
double pi=3.14;
System.out.println(pi);
...
°Output: 3.14
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...
double n=5;
System.out.println(n);
...
°Output: 5.0
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Answer 2

Double is a primitive data type for decimal numbers like 2.5; 1.333; 4.0...
https://www.baeldung.com/java-primitives

Answer 3

Thanks