Write an awk script which prints the first column of a comma-delimited file

Sample Input

A, 1

B, 2

C, 3

Output for above:

A

B

C

You will need to:

Take an input file which has two comma-delimited columns and print only the first column.

You will need to understand that awk works with fields, the default field separator is a space. Be sure to change that to a comma. The first column is the first field.

Note that your awk program is ran on each *record* in the file. By default a record is a line of text.