如果用户输入空字符串，如何提示输入和退出? [英] How to prompt for input and exit if the user entered an empty string?

问题描述

我是 Perl 的新手，我正在编写一个程序，我想强制用户输入一个单词.如果用户输入一个空字符串，那么程序应该退出.

I'm new to Perl and I'm writing a program where I want to force the user to enter a word. If the user enters an empty string then the program should exit.

这是我目前所拥有的:

print "Enter a word to look up: ";

chomp ($usrword = <STDIN>);

推荐答案

大功告成.

print "Enter a word to look up: ";
my $userword = <STDIN>; # I moved chomp to a new line to make it more readable
chomp $userword; # Get rid of newline character at the end
exit 0 if ($userword eq ""); # If empty string, exit.

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