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Rules for constructing an Arithmetic Expression:
The rules for constructing an arithmetic expression are as shown below:
(i) When an arithmetic expression specifies a calculation, it may consist of two or more numeric literals and/or data names joined by the arithmetic operators. The following table lists some of the operations and their meaning.
There should be at least one space preceding and the operator in an arithmetic expression is as shown below. No two arithmetic operators can appear altogether in an expression. In this respect the ** is considered as a single operator.
(i) Parentheses may be used to indicate the order of the operations in an arithmetic expression. Where the parentheses are absent, then the order is taken to be left to right as shown:
Whenever the parentheses are used, the part of the expression enclosed within the parentheses is computed first.
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DIVIDE VERB: The aim of the DIVIDE verb is to divide one number by the other and to store the result. There are few forms of this verb. One of its forms is as shown below:
READ STATEMENT: The aim of this verb is to make available the next logical record from the input file. It is important to note the meaning of the "next" logical record in the
BLOCK CONTAINS CLAUSE: Integer -1 of the BLOCK CONTAINS clause indicates the block size either in terms of records or in terms of characters. For illustration, BLOCK CONTAINS
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