How iterated array values store in a testing

Can someone please explain me how an array of multiple values work in an interactive testing.

''' If Temp A="abc" then temp b="y" Endif'''

Eg. Array[1]="abc" Array[2]="BCD"

In an interactive testing I need the output as temp b="y", but I'm getting output as temp b="n" so when I include array[3]="EDF" value then it's giving temp b="y" which is wrong output.