linux - resetting value of a local variable -

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i using local variable record in loop like

record=$(awk 'nf!=4 {print $0}' n20${i})

but everytime instead of taking new value appends last value new value. how can solve problem? in advance.

record=$(awk 'nf!=4 {print $0}' n20$((i++)))

that increment value of i each time line executed.

or if want i+1 without changing value of i:

record=$(awk 'nf!=4 {print $0}' n20$((i+1)))

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