perl string-comparison Perl 中可以使用比较运算符(如 ==,!=,<,>,<=,>=)来比较两个字符串。例如: $str1 = "Hello"; $str2 = "World"; if ($str1 == $str2) { print "The strings are equal\n"; } else { print "The strings are not equal\n"; }发布于 4 月前 本站已为你智能检索...
Perl provides numeric comparison operators to check if a string is empty or not. ==The equal operator checks if the given string matches another string. !=The not equal operator is the reverse of == operator. String check blank using==operator example string length is zero using==operator. ...
print "Comparison of Operator is True\n" ; } else { print "Comparison of Operator is False\n" ; } 输出如下: Equal To Operator is False Not Equal To Operator is True Greater Than Operator is False Less Than Operator is True Greater Than Equal To Operator is False Less Than Equal To O...
my $operator = prompt "Operator: [+-*/]:"; my $b = prompt "Number:"; given $operator { when "+" { say $a + $b; } when "-" { say $a - $b; } when "*" { say $a * $b; } when "/" { say $a / $b; } default { say "Invalid operator $operator"; } } string...
Concatenation Operator (.):Combines two strings to form a result string. Repetition Operator (x):Repeats string for a specified number of times. Example $str1 = “abc”; $str2 = “def”; $str3 = $str1.$str2; #concatenates the string and str3 has value ‘abcdef’ ...
Perl string comparison In Perl, strings are compared with theeqoperator. comparison.pl #!/usr/bin/perl use 5.30.0; use warnings; my $w1 = 'falcon'; my $w2 = 'Falcon'; if ($w1 eq $w2) { say 'the strings are equal'; } else { ...
three-way string-comparison operator: cmp. These two are easy to rememberand keep straight. >=有两种可能的返回值,而<=>有三种可能的返回值,因为>=是两个字符,<=>是三个字符。同样道理, ge有两种可能的返回值,而cmp有三种可能的返回值,因为ge有两个字符,而cmp有三个字符。
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28. Which string comparison operator would be equivalent to the numeric > operator? A ne B eq C ge D gt 29. Which function can be thought of as the opposite of split? A link B join C unite D bond 30. Which operator can be used to add an item to the bottom of an array?