Commatizing numbers: Difference between revisions

=={{header|Phix}}==

(Ignoring the bulk of the task requirement.)

Of course you can and should insert commas when creating the string in the first place, rather than struggling with it later.

<lang Phix>printf(1,"Without commas: %8.2f; with: %,8.2f\n",14440.00)</lang>

{{Out}}

<pre>

Without commas: 14440.00; with: 14,440.00

</pre>

If however you have identified a fragment of text, then you can do things like this:

<lang Phix>function add_commas(string s)

for i=length(s)-3 to 1 by -3 do

s[i+1..i] = ","

end for

return s

end function

string s = "---123456789---"

s[4..-4] = add_commas(s[4..-4]) -- (or ..+12 if you prefer)

?s</lang>

<pre>

"---123,456,789---"

</pre>