UNIX for Dummies Questions & Answers

Hi All,
I am writing a perl script where I take 2 variables from the user as STDIN to scan the lines of a file to produce as output.

How can I do an IF loop to test this for example in the mock file

Code:

12 10
35 20
37 5
45 12

if I take user input as 40 and 10, how can I get the output lines in which $F[0] has a value of 40 or more AND $F[1] has a value of 10 or more, to get output

Code:

45 12

I would also like to know how I can make it do the same for $F[0] >= 40 or more OR $F[1] >= 10 or more to get output:

Code:

12 10
35 20
45 12

Can someone enlighten on this ? I would appreciate Perl solutions as I am learning that.
Cheers and have a nice day

If schoolwork, there is a guideline to read and template required. How far did you get?

@DGPickett:
This is not homework ... I have a personal interest in learning Perl as a skill to get some data analysis done in my routine work.
At the moment my code has two separate IF loops within the WHILE (<I>) as it reads the file, but I was wondering if there is a way to combine the two if statements.
I tried implementing

Code:

if ((condition_1) && (condition_2)){

and

Code:

if ((condition_1) || (condition_2)){

versions but didnt get the desired output.
Any other ideas how it can be done?
Cheers

Well, You cannot do both tests at once, && is the logical and, but you did not show how you removed the digits from the line to test them. Print out the substrings as a debug to stderr. You may be testing a carriage return or the whole line or an empty string.