trap ctrl c in shell script

how to trap the ctrl c in unix shell script

my script is running in while loop it should not be terminate with ctrl c.

if i press ctrl c while running script it shloud ignore the same.

please healp..........

thanks in advance

There is plenty on the web already:
Trapping Exits Caused by Interrupts | O'Reilly Media

So trap signal 2 and 3.

trap sig_handler 15

or trap sig_handler SIGTERM