AND(b1, b2, ...)
AND implements the logical AND function: the result is TRUE if all of the expressions evaluate to TRUE, otherwise it returns FALSE.
b1 through bN are expressions that should evaluate to TRUE or FALSE. If an integer or floating point value is provided, zero is considered FALSE and anything else is TRUE.
AND(TRUE,TRUE) equals TRUE.
AND(TRUE,FALSE) equals FALSE.
Let us assume that A1 holds number five and A2 number one. Then
AND(A1>3,A2<2) equals TRUE.