[jQuery] how to create a function in jquery?

[jQuery] how to create a function in jquery?


I wanted to create a function that will return an array consisting
values from 3 textboxes.
let's say:
$('document').ready(function() {
    $('input#button_a').click(function() {
     a = $('input#input_text_a').val();
     b = $('input#input_text_b').val();
     c = $('input#input_text_c').val();
     });
     $('input#button_b').click(function() {
     a = $('input#input_text_a').val();
     b = $('input#input_text_b').val();
     c = $('input#input_text_c').val();
     });
     $('input#button_c').click(function() {
     a = $('input#input_text_a').val();
     b = $('input#input_text_b').val();
     c = $('input#input_text_c').val();
     });
});
is there a way I can create the function within this jquery script? or
is there a workaround?
please teach me, I am new in this aspect. thank you in advance!