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Concatenation also it is designated by "+ sign.For example, result of performance of following commands:
R: = ' kadabra ';
H: = ' abra ';
S: = H+R;
In variable S there will be a value ' abrakadabra '.
For concatenation the result depends on an order of operands (unlike addition operation). It is necessary to remember what maximum length can
To be a resultant a variable as in case of excess by value of expression of the number specified after String in a variable declaration, "superfluous" characters will not get to a variable.
String values can be compared among themselves. It concerns as well string variables. But as the computer defines, what string
It is more: that, which is longer?
That, which contains more capital letters?
Actually such check passes difficult enough: the computer
Compares at first the first characters of strings. Big from two that is considered, which code more (recollect that such the character code). If the first characters as the following pair is parsed are equal until will be
Distinction is found. If the beginning of strings coincides, and one of them comes to an end earlier the second automatically is named ???????.
The character code in Pascale can be defined by means of function Ord.
Its format: Ord (C), where With - either directly specified character, or a character type variable, or one character of a string variable. In general, function Ord has deeper sense, but about it is later. There is also a return
Function which returns the character on a known code. It is function Chr (N), where N - the expression leading to an integer in the range from 0 to 255 possible value of the character code). It is obvious that Chr (Ord (C)) =C, Ord (Chr (N)) =N.
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