awk Built-in Variables NF - Number of Fields
Example
This variable will give you a total number of fields in the current input record.
awk -F',' '{print NF}' file.csv
Example:
$ cat file.csv
col1,col2,col3,col4
col1,col2,col3
col1,col2
col1
col1,col2,col3,col4,col5
$ awk -F',' '{print NF}' file.csv
4
3
2
1
5
