please help on convert amount to without coma amount by function

Hello every one,
Please help me on convert amount to amount without coma
example : amount 1,000.00 to convert 1000 by function or any other way

 

amit sir please help

 

Try This........
Format : "NoComma,Decimal:0"

 

This used in field level
but i want detail for qr code payment
at part level for qr code

 

please help