Perl sprintf Function: Format Strings in Perl

The sprintf function is a function in the Perl language that converts variables to strings according to a specified format.

For example, the sprintf function can be used to convert a number into a string with a fixed length, or to output dates in a specific format. The syntax for this function is as follows:

sprintf(format, list)

In this case, format is a formatting string used to specify the output format, and list is the list of variables to be formatted. The sprintf function will format the variables in list according to the format requirements of format and output them as a string.

For example, the following code formats a number as a string with a fixed length:

my $num = 123;
my $formatted_str = sprintf("%05d", $num);
print $formatted_str; # 输出为"00123"