Answer: – Selecting the proper data type is important because a variable’s data type determine the amount of memory the variable uses, and the way the variable formats and stored information. It is important to select a data type that is appropriate for a type of information that our program will work with. If we are writing a program to calculate the number of miles to a distance star we will need to variable that can hold very large number. If we writing a program that must performed thousands of intensive calculations, we want variables that can we processed quickly various data type of visual basic are as fallows –
Data Type |
Description |
Boolean | Used to hold the values true or false. |
Byte | Holds a small number in the range 0 through 255. |
Currency | Store number with up to 15 digits to the left of the decimal point, and up to 4 digits to the right of the decimal point. It’s called “Currency” because math operations on variable of this data type are very accurate and suitable for calculations involving money. |
Date | Stores date and time information. |
Double | Holds double-precision floating-point number, rounded to 14 digits of accuracy. |
Integer | Used to store whole numbers in the range of -32,768 to +32,767. |
Long | Used to store whole number in the range of approximately -2 billion to +2 billion. |
Single | Holds single-precision floating-point number, rounded to 6 digits of accuracy. |
String | Holds strings, which may consist of letters, numbers, punctuation symbols, etc. |
Variant | Can store any type of information. |
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