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| pattern | value-start, |= | ||||||||
Syntax
value-start
A positional pattern recognized at the start of a scanning source (a value at the head of a do scan or repeat scan and so on).
Two forms of the value-start pattern are available - the long form and the short form, |=. You should use whatever form leads to the most readable code. 
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Related Syntax do scan repeat scan  | 
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