Instead I see Int and Double, particularly when SHORT and FLOAT are sufficient. Float and double are primitive data types used by programming languages to store floating-point real (decimal) numbers like 10.923455, 433.45554598 and so on. As double has more precision as compare to that of flot then it is much obvious that it occupies twice memory as occupies by the float data type. Figure 02: Casting. According to IEEE, it has a 64-bit floating point precision. There are eight major primitive types in Java. For example, double floating point numbers have larger ranges than Decimal numbers and Double is the most efficient floating-point data type. Also range of both the data types could be represented as ±3.40282347E+38F i.e. They are int, short, byte, long, boolean, char, float and double. In most of the threads I read including mine, I seldom see Short or Float used to DIM variables. It has the double precision or you can say two times more precision than float. On the other hand, the double type has 64-bit storage. The variable num2 has value 20. Wrapper classes are used for that. Float vs Double: Difference You should know Double takes 8 bytes for storage. In the scheme of things, devices have more memory and are faster. If you only need to store whole numbers, such as 12 or 12,345,678, specify a short or long integer. Long integer; Float (single-precision floating-point numbers) Double (double-precision floating-point numbers) In choosing the data type, consider the need for whole numbers versus fractional numbers. Using the float() function each string or integer could be changed to a float, e.g: Long integer; Float (single-precision floating-point numbers) Double (double-precision floating-point numbers) In choosing the data type, first consider the need for whole numbers versus fractional numbers. Float and Double both are the data types under Floating-point type. Both int and double are used with modifiers like short, long, signed and unsigned. long double: Real floating-point type, usually mapped to an extended precision floating-point number format. {double atoms; atoms = 2304.01;} Comparison between Double and Integer in C programming language: Float takes 4 bytes for storage. The types float, double and the variant long double, are all considered to be floating-point types. Is that the reason? 6-7 significant digits for float and ±1.79769313486231570E+308 i.e. The primary difference between float and double is that the float type has 32-bit storage. The default choice for a floating-point type should be double.This is also the type that you get with floating-point literals without a suffix or (in C) standard functions that operate on floating point numbers (e.g. 15-16 significant digits for double. The total is an int. If you just need to store whole numbers, such as 12 or 12,345,678, specify a short or long integer. When assigning a larger data type to a small data type, it is necessary to do the casting. Summary – Integer vs Float. The Floating-point numbers are the real numbers that have a fractional component in it. The widening happens in a byte, short, int, long, float, double. or is it insignificant that it does not make an impact. Each primitive type has a corresponding wrapper class. Actual properties unspecified. Sometimes it is necessary to convert the primitive data types to object and object to primitive types. exp, sin, etc.). To check if something is a float we can use the isinstance() function, e.g: isinstance(4.5, float)# returns True As a general rule integers don't have a decimal point, whereas floats do, so 55 and 55.0 have the same value but they are different types. Double variables can hold numbers as small as -4.94065645841246544E-324 for negative values and 4.94065645841246544E-324 for positive values . According to IEEE, it has a 32-bit floating point precision. 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