Techniques for converting a string into a number in an awk

In awk Programming, do not forget that awk can process regular expressions. There are also a lot of internal functions, especially string processing functions. in the process of data processing, calling these functions can reduce the workload. 1. format // Note \ there cannot be spaces behind it, BEGIN... in awk Programming, do not forget that awk can process regular expressions. There are also a lot of internal functions, especially string processing functions. in the process of data processing, calling these functions can reduce the workload. 1. format // Note \ there cannot be spaces behind the END, and the "'" at the start position of BEGIN and the "'" at the END position cannot be forgotten. Awk-f' | '\' BEGIN {// begin part of awk} {// execution part of awk. to exit during processing, use exit (value ); it is equivalent to the END part of break} end {// awk in C language} '$ {old_filename} >>$ {new_filename} // old_filename is the file name to be processed. 2. variable reference in awk part, use the shell variable awk_value_name = "'$ {shell_value_name}'"; 3. in awk, convert a string to a number: in awk, convert a number string to a number: blockid = "1245"; when we need blockid to be a number, blockid = blockid + 0;