First, you should chomp $ask: 
chomp $ask;

[download]
Next, you need to type in the word Add when prompted: 
Type in a number: 2
Type in another number: 3
What would you like done?

Your choice is:
1) Add
2) Subtract
3) Multiply
4) Divide
Add
2 + 3 = 5

[download]
Other advice:

In reply to Re: my program will not display a correct answer, to a random question? by toolic
in thread my program will not display a correct answer, to a random question? by rse2

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