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