If the largest value found in matrix A is less than 20, P is set to 0. Otherwise, P is set to 1. You can nest IF statements within the clauses of other IF or ELSE statements. Any number of nesting ...

The IF statement results in the evaluation of the condition MAX (A)<20. If the largest value found in matrix A is less than 20, P is set to 0. Otherwise, P is set to 1. See the description of the for ...