how to change mtu in multiplevlan with single click

RouterOS Beginner Basics
1

Hi,
in my MikroTik, I have added around a number of 2000 VLAN and I need to change MTU
so help me how to change MTU in all VLAN with single or any script

2

Terminal one liner:

/interface/vlan; :foreach i in=[find] do={set $i mtu=1500}
3

This is not V7 beta section,
and the OP do not wrote what version of routeros use.
As “RouterOS > Beginner Basics” must be supposed than use at least the long term version

also the script must be corrected for more clear syntax,
but “old and new” command line change all VLAN MTU regardless of use

/interface vlan set [find] mtu=1500

But…

I have added around a number of 2000 VLAN and I need to change MTU

you really haved addedd 2000 CPU VLAN instead of use bridge VLAN???
Uhm…