Perl
Perl is a high-level, general-purpose programming language known for its powerful text-processing capabilities, flexibility, and extensive library support. In bioinformatics, it has been widely used for parsing, analyzing, and manipulating biological data such as DNA sequences, protein structures, and genomic annotations due to its strong regular expression handling and rapid prototyping features.
Developers should learn Perl for bioinformatics when working with legacy bioinformatics tools, scripts, or pipelines, as it was historically dominant in the field and many existing resources (e.g., Bioperl) rely on it. It is particularly useful for tasks involving complex text parsing, data extraction from biological databases, and quick script development for data processing, though newer languages like Python are now more common.