{"id":1070,"date":"2012-04-05T19:48:28","date_gmt":"2012-04-05T11:48:28","guid":{"rendered":"http:\/\/www.vbtutor.net\/index.php\/"},"modified":"2017-11-06T20:18:22","modified_gmt":"2017-11-06T12:18:22","slug":"visual-basic-2010-lesson-6","status":"publish","type":"page","link":"https:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-6\/","title":{"rendered":"Visual Basic 2010 Lesson 6- Managing Data"},"content":{"rendered":"

[Lesson 5] <\/a><< [CONTENTS]<\/a> >> [Lesson 7]<\/a><\/strong><\/h4>\n

Every day we deal with many kinds\u00a0of data. Examples of data are names, addresses, money, dates, share prices, bills, phone numbers and more. Similarly, in Visual Basic 2010, we have to deal different types of data.<\/p>\n

6.1 Visual Basic 2010 Data Types<\/h3>\n

We classify Visual Basic 2010\u00a0 data into two major data types, the numeric data types and the non-numeric data types.<\/p>\n

6.1.1 Numeric Data Types<\/h4>\n

Numeric data types are data that consist of numbers that we can calculate them using mathematical operators. In Visual Basic 2010,\u00a0 we categorise numeric data into 7 types, depending on the range of values they can store. Calculations that only involve round figures can use Integer or a Long integer in the computation. On the other hand, high precision calculations need to use Single and Double decision data types, which are also called floating point numbers.<\/p>\n

In addition, for currency calculation, you can use the currency data types. Lastly, if even more precision is required to perform calculations that involve many decimal points, we can use the decimal data types. These data types are summarized in Table 6.1.<\/p>\n

Table 6.1 Numeric Data<\/h4>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Type<\/th>\nStorage<\/th>\nRange of Values<\/th>\n<\/tr>\n
Byte<\/td>\n1 byte<\/td>\n0 to 255<\/td>\n<\/tr>\n
Integer<\/td>\n2 bytes<\/td>\n-32,768 to 32,767<\/td>\n<\/tr>\n
Long<\/td>\n4 bytes<\/td>\n-2,147,483,648 to -2,147,483,648 <\/td>\n<\/tr>\n
Single<\/td>\n4 bytes<\/td>\n-3.402823E+38 to -1.401298E-45 for negative values
\n1.401298E-45 to 3.402823E+38 for positive values\n<\/td>\n<\/tr>\n
Double<\/td>\n8 bytes<\/td>\n-1.79769313486232E+308 to -4.94065645841247E-324 for negative values
\n4.94065645841247E-324 to 1.79769313486232E+308 for positive values\n<\/td>\n<\/tr>\n
Variant(numeric)<\/td>\n16 bytes<\/td>\nAny value as large as double<\/td>\n<\/tr>\n
Currency<\/td>\n8 bytes<\/td>\n-922,337,203,685,477.5808 to 922,337,203,685,477.5807<\/td>\n<\/tr>\n
Decimal<\/td>\n12 bytes<\/td>\n+\/-79,228,162,514,264,337,593,543,950,335 if no decimal
\n+-7.9228162514264337593543950335\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n