Hi Sadashiva,

Please copy and paste the below code in your client script, you will get the desired output.

Type: onChange

Field name: <name of the choice field>

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
   if (isLoading || newValue === '') {
      return;
   }
 //Replace u_custom_choice with your choice field name
   g_form.showFieldMsg('u_custom_choice','Test  '+newValue,'info');
   
}

If I was able to resolve your issue then please mark as Correct and Helpful.

Regards,

Subhojit