# reading from a file
while ( <> ) {
    push @LoL, [ split ];
}

# calling a function
for $i ( 1 .. 10 ) {
    $LoL[$i] = [ somefunc($i) ];
}

# using temp vars
for $i ( 1 .. 10 ) {
    @tmp = somefunc($i);
    $LoL[$i] = [ @tmp ];
}

# add to an existing row
push @{ $LoL[0] }, "wilma", "betty";