A few simple VBs

abs function: calculates the absolute value.

rnd function: Returns a single-precision number containing a random value. Without parameter, it is a decimal between 0 and 1.

MID function: Returns the number of characters contained in the string.

mid(string,start[,length])

where string is the required string expression from which the character is returned. If the string contains null, it will return the required long parameter, which represents the character position of the removed part of the string. If start exceeds the number of characters in the string, MID returns a zero-length string ("").

length is an optional variant(long) parameter that represents the number of characters to be returned. If the omitted or length exceeds the number of characters in the text (including the characters at start), all characters in the string from start to end will be returned.

The midb function works on the byte data contained in the string, just as it does in a double-byte character set language. Therefore, the parameter specifies the number of bytes, not the number of characters.

str function: returns the string. converted by the specified type

sqr(4+3*7)=5 first calculate the parentheses to get 25, and then sqr is the square root, so it is 5

int(-17,8) is the wrong expression.

abs(-235) =235, as mentioned earlier. is an absolute value.

The LEN (ABC of the High School Affiliated to the University of Shanghai for Science and Technology) value is 0Because vb will treat the parentheses as variable names.

If yes. len("ABC of the High School Affiliated to University of Shanghai for Science and Technology"), then the value is 13 and len is the length of the calculated string.

The results of the 4 expressions are:

Programming 100 points.

truefalse

If not, you can put him in the vb and calculate it yourself.

abs(): Find the absolute value.

rnd(): Generates a random number in the range of 0200and sqr(na)>10 or la = true

len(sa)=12 and not la and na=100 =false

VB Teaching is a software that supports Win9X NT 2000 XP.

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It's still hard to learn C language well! VC and C++ are about the same level of difficulty as VB. VB is a high-level language, and C language is a language between high-level languages and low-level languages, so the functions are much more than VB and VC (I personally think), and assembly language is still essential if you want to become a master!

VB is a programming language developed by Microsoft, most of the semantics borrow from the statements of Basice, but the graphical programming interface is realized, and the object orientation is realized, called Visurl Basic for short, VB, which can be used to make some small programs and complete some desired functions, and has now developed to.

Visual Basic is a structured, modular, object-oriented, and event-driven visual programming language developed by Microsoft that includes an event-driven mechanism to assist in the development environment.

Visual Basic can be used to develop desktop applications, database management applications, and a large number of graphical applications.

VB is the most spoken language in the world by any standard - both the number of developers who praise VB and the number of developers who complain about it. It is derived from the basic programming language. VB has a graphical user interface (GUI) and a rapid application development (RAD) system, which makes it easy to connect to the database using DAO, RDO, ADO, or easily create ActiveX controls.

Programmers can easily build an application quickly using the components provided by VB.

Visual Basic has been greatly improved in terms of data access, and the new ADO component makes it possible to quickly access large amounts of data. The data environment and new reporting capabilities also provide a new experience for data development. Visual Basic enables the development of distributed applications with an N-tier structure thanks to the power of COM Com+.

At the same time, Visual Basic can also develop high-performance web applications on IIS. Visual Basic has not improved much in terms of language and IDE, but many of the new components have become useful tools for Visual Basic developers, such as File System Object. New string functions, such as split and replace, are also very convenient for Visual Basic programmers.

It enables enterprises to quickly build multi-layered systems and web applications, and has become the most popular version of Visual Basic on Windows. Reference.