Data types and operators in vb
- 1. Datatypes in VB.net: The data typesof a programmingelement refertowhatkindof data itcan holdandhow it storesthat data. A data type, in programming, is a classification that specifies which type of value a variable has and what type of mathematical, relational or logical operations can be applied to it without causing an error. A string, for example, is a data type that is used to classify text and an integer is a data type used to classify whole number Types of data types in vb.net: 1: Booleandatatype. 2: integerdatatypes. 3: FloatingPointsnumber. 4: Stringand chars. 5: Date. 1) Boolean: A Boolean stores a value indicating True or False. It can be used as an expression in an If-statement. It can also store the result of an expression. Booleans are used throughout VB.NET programs. “Dim valuesasBoolean” Value = true Or Value = False. Dimloginas Boolean. Password= ‘BSCS’ 2) Integers: Integer is a core type in VB.NET programs. It is the default numeric type. Usually loops use the Integer type for their indexes. An Integer is declared with a Dim statement. It can store positive values, such as 1, and negative values, such as -1. In integerswe take whole number. Example:we make a program where youwantthat users entertheirage so,whenthey enter theirage you needtodefine variables. Dimage As byte. Login= true Username SBK
- 2. Age=24 3) Floating Points Numbers: If sometimesuserinputsfloatingpointnumberso, theyuse floatingpointnumbersdatatypes. for example:we make aprogram where studentswant toentertheirpercentage Dimpercentage assingle Percentage=78.9 Decimal values cannotbe storedinintegerbecause inintegernumberswe canstore onlywhole numberthatis withoutdecimal point. 4) Strings and Chars: Stringisa data type representingtextual dataincomputerprogram.The Char type is useful. Chars are value types. This means they are located in the bytes on the evaluation stack. You can get individual Chars from a String variable. Example: Dimusername asstring Username = “Fatima” Dimcity as string City= “Quetta” Dimschool name as string School name = “ SBK“ 5) Date: A date is value type whichcontainsdate values,time values,ordate andtime values. Dimtoday as date Today = now() Data Types Available in VB.Net VB.Net provides a wide range of data types. The following table shows all the data types available: Data Type Storage Allocation Value Range Boolean Depends on implementing platform True or False
- 3. Integer 4 bytes -2,147,483,648 through 2,147,483,647 (signed) Decimal 16 bytes 0 through +/- 79,228,162,514,264,337,593,543,950,335 (+/-7.9...E+28) with no decimal point; 0 through +/- 7.9228162514264337593543950335 with 28 places to the right of the decimal Double 8 bytes -1.79769313486231570E+308 through - 4.94065645841246544E-324, for negative values 4.94065645841246544E-324 through 1.79769313486231570E+308, for positive values Single 4 bytes -3.4028235E+38 through -1.401298E-45 for negative values; 1.401298E-45 through 3.4028235E+38 for positive values String Depends on implementing platform 0 to approximately 2 billion Unicode characters Char 2 bytes 0 through 65535 (unsigned) Date 8 bytes 0:00:00 (midnight) on January 1, 0001 through 11:59:59 PM on December 31, 9999 Operators in VB.Net: An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations. VB.Net is rich in built-in operators and provides following types of commonly used operators: Arithmetic Operators Comparison Operators
- 4. Logical/Bitwise Operators Assignment Operators Concatenation Arithmetic Operators This table shows all the arithmetic operators. Assume variable A holds 2 and variable B holds 7, then: Comparison Operators This table shows all the comparison operators. Assume variable A holds 10 and variable B holds 20, then: Operator Description Example ^ Raises one operand to the power of another B^A will give 49 + Adds two operands A + B will give 9 - Subtracts second operand from the first A - B will give -5 * Multiplies both operands A * B will give 14 / Divides one operand by another and returns a floating point result B / A will give 3.5 Divides one operand by another and returns an integer result B A will give 3 MOD Modulus Operator and remainder of after an integer division B MOD A will give 1
- 5. Operator Description Example = Checks if the values of two operands are equal or not; if yes, then condition becomes true. (A = B) is not true. <> Checks if the values of two operands are equal or not; if values are not equal, then condition becomes true. (A <> B) is true. > Checks if the value of left operand is greater than the value of right operand; if yes, then condition becomes true. (A > B) is not true. < Checks if the value of left operand is less than the value of right operand; if yes, then condition becomes true. (A < B) is true. >= Checks if the value of left operand is greater than or equal to the value of right operand; if yes, then condition becomes true. (A >= B) is not true. <= Checks if the value of left operand is less than or equal to the value of right operand; if yes, then condition becomes true. (A <= B) is true. Logical/Bitwise Operators This table shows all the logical operators. Assume variable A holds Boolean value True and variable B holds Boolean Value False, then: Operator Description Example And It is the logical as well as bitwise AND operator. If both the operands are true, then condition becomes true. This operator does not perform short-circuiting, i.e., it evaluates both the expressions. (A And B) is False. Or It is the logical as well as bitwise OR operator. If any of the two operands is true, then condition becomes true. This operator does not perform short-circuiting, i.e., it (A Or B) is True.
- 6. evaluates both the expressions. Not It is the logical as well as bitwise NOT operator. Use to reverses the logical state of its operand. If a condition is true, then Logical NOT operator will make false. Not(A And B) is True. Xor It is the logical as well as bitwise Logical Exclusive OR operator. It returns True if both expressions are True or both expressions are False; otherwise it returns False. This operator does not perform short-circuiting, it always evaluates both expressions and there is no short-circuiting counterpart of this operator. A Xor B is True. Name = Fatima F/name = SadiqAli Assignment=Visual programming Submittedto= Ma’am Nausheen Enroll = S14/BSCS/49 Semester=7th