Common errors in perl

Check for these common errors before you try to debug a program:

• no semi-colon at end of line.
• matching pairs of delimiters: ( ), { }, [ ].
• Using = when you mean ==.
• Using == when you mean eq.
• Using == when you mean =~.
• Disagreement of field, array or hash names (remember $data,$data[1],$data{1} and $Data are four different entities.
• Disagreement of subroutine names between execution and definition.
• Incorrect use of if, elsif, else.
• Not checking your program (and correcting the errors) using the -w switch.