Example 1: When String1 is less than String2. Returns: -1 if string1 is less, 0 if equal and 1 if greater than string2. The value is checked in the case of numeric operators. cmp operator in Perl is a string equality comparison operator used to compare if the two strings placed left and right to this operator are equal or less than the other. A string can contain ASCII, UNICODE and escape sequences characters such as n. These operators also work on the ASCII values which are checked in the case of string operators. In Perl, a string is a sequence of characters surrounded by some kinds of quotation marks. The Perl compiler matched the first letter and then matched the rest. Since block letters come first in the ASCII table. Perl’s string operator only first check the first character of String and compares ASCII codes. Copy and paste the following Perl program in file and execute this program.
A Perl string has the length that depends on the amount of memory in your system, which is theoretically unlimited. Assume variable a holds 'abc' and variable b holds 'xyz' then, lets check the following string equality operators Example Try the following example to understand all the string equality operators available in Perl. A string can contain ASCII, UNICODE and escape sequences characters such as. The string passed to m operator can be enclosed within any character which will be used as a delimiter to regular expressions. This point can be clear from the second line of the second example’s output In Perl, a string is a sequence of characters surrounded by some kinds of quotation marks. m operator in Perl is used to match a pattern within the given text. Let’s say the Perl “lt” operator is not case sensitive, but we even put “ZZZ” after that and even in that case $str is not less than the string in quotes and the next output showed that it was greater. The first example’s output is very obvious since both string and numeric operators treat Numeric scalars the same way.īut in the second Output, the “lt” didn’t behave as we expected. So it compares '1' to '3' and as they are different and '1' is before '3' in the ASCII table Perl decides at this point that 12 as a string is smaller than 3 as a string.
PERL STRING COMPARE CODE
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