7.4. Nested if/then Condition Tests

Condition tests using the if/then construct may be nested. The net result is identical to using the && compound comparison operator above.

if [ condition1 ]
then
 if [ condition2 ]
 then
 do-something # But only if both "condition1" and "condition2" valid.
 fi 
fi

See Example 34-4 for an example of nested if/then condition tests.