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Q. Explain Span and average span size of a program?
Span dimension indicates the number of statements that pass between successive uses of a variable. For illustration in the following sample of code variable x has 4 spans of 10,12,7, and 6 statements while y has 2 spans of 23 and 14 statements. This demonstrates x is being used more than y.
Average span size=(S span size of a variable in a program)/no. of span
For instance
Average span size of variable x in the above sample = (10+12+7+6)/4=8.75
Average span size of variable y = (23+14)/2=18.5
Explain a variable? "Variables" are data items in a program whose values can change.
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