String -The string data type can hold multiple characters as a sentence or word
like “Hello” and a string needs the quotation marks around the word
so that the program knows that that is the word to be used string is generally
understood as a data type and is often
implemented as an array data structure of
bytes (or words) that stores a sequence of elements, typically characters,
using some character encoding.

Single -Holds signed IEEE 32-bit (4-byte) single-precision
floating-point numbers ranging in value from -3.4028235E+38 through
-1.401298E-45 for negative values and from 1.401298E-45 through 3.4028235E + 38
for positive values. Single-precision numbers store an approximation of a real
number.

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Source-

https://docs.microsoft.com/en-us/dotnet/visual-basic/language-reference/data-types/single-data-type

Use the Single data type so that you can contain floating-point values
that do not require the full data width of Double. In some cases the most common language runtime might be
able to pack your Single variables
closely together and save memory consumption. This is what businesses want from
there I.T workers to make the code efficient and quick.

Boolean -Boolean is a part of a bigger group
of algebra that is used to making a True/False statement. True will be written
as the number 1, whereas false will be written as the number 2. Boolean can be
written in both algorithms and coding. Boolean was created by the English
mathematician and computer pioneer George Boole so this is why it’s called the
Boolean theory.

A Boolean is composed of operators
such as and, or, not and or. Booleans are used in programming and today in
internet search engines. Boolean expressions are the result in the value of
either true or false. As mentioned above, a user can use
Boolean searches to help locate more exact matches in internet searches.

Integer- This is a quite common data type. You also may find integers in math and
it means the same thing a whole number. Integer is very useful in programing as
numbers are used quite a lot in programing overall. Programmers have to pick a
certain data type for that certain character so that they don’t waste a lot of
memory.

Double-The
float type allows you to store single-precision floating point numbers, while
the double keyword allows you to store double-precision floating point numbers
– real numbers, in other words. Its size is typically two machine words, or 8
bytes on most machines.  This is the decimal point number data
type you would use this for mathematical equations like division
because division problems are likely to have a decimal point in the answer.

Byte-A byte is the smallest unit of addressable storage
although a bit is smaller than a byte, a single bit cannot be addressed
directly; we always deal with groups of bits and a byte in the smallest group
of bits that can be physically addressed. However, once we have addressed a
byte, we can then examine the individual bits within it using the logic
operators AND, OR, NOT and XOR. On most systems a byte is exactly 8 bits in
length. The reason for this is simply that we can represent any 8-bit value
using a convenient two-digit Not all programming languages utilise a byte data
type as such.