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Example of constructing an arithmetic expression:
An arithmetic expression may be proceeded by a + or - sign. These operations are known as unary + or unary - operators.
Illustrations of the valid arithmetic expressions are:
Note that whenever the right-hand side of a COMPUTE verb is a single identifier or literal, then the effect is that of a MOVE statement.
Illustration:
COMPUTE A = B + C
has similar effect as that of the ADD B C GIVING A
COMPUTE F = 1.8 * C + 32
The value of the expression on the right-hand side is computed and this value is then moved to the F. Assume that the C & F are defined with pictures 99 & ZZ9.9 respectively and the present value of C is 3. Subsequently after the execution of the statement, the F will have the value 37.4.
Rules for apply for the condition name: The rules below apply for the condition name. (i) The Condition names should be explained at level 88. The level number starts in ma
SEQUENTIAL FILES: The purpose of the proposed section is to introduce the concepts such as File characteristics, File Description for Fixed-Length Records, File-Control
RULES OF RENAMES CLAUSE: The rules below should be observed while using the RENAMES clause: (i) All RENAMES entries should be written only after the last record descript
Example of Open statement: Illustration: The OPEN INPUT TRANSACTION, OLD-MASTER OUTPUT NEW-MASTER. The illustration represents that there are two input files named the
CLOSE STATEMENT: When the processing of a file is completed, then the file may be closed. This is completed with the help of the CLOSE-verb. The form of the CLOSE statement is
Data Names and Identifiers: The Data name provides reference to the storage space in the memory where the real value is stored. This value takes part in the operation whene
Figurative Constants: The Figurative constants have several fixed names and the compiler recognizes these names and it sets up the equivalent values in the object program.
Configuration Section: This section holds an overall specification of the computer used for the purpose of the compilation and execution of the program. There are in all 3 par
FILLER CLAUSE: Consider the statements as shown below: 1) 01 f pic x(80) value all "-". This statement origins a line of 80 characters filled with "-"
NONSTANDARD CLAUSES: The various clauses explained above are as per the ANSI standard. Also, most compilers provide for additional nonstandard clauses to meet the specific nec
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