Hi @Abhishek Vyas ,
Hope you are looking for something like
iif(!isNull(toString(byName('Address1'))) && !isNull(toString(byName('Address2'))) && !isNull(toString(byName('LineAddress3'))),
concat(iifNull(toString(byName('Address1')), ''), iifNull(toString(byName('Address2')), ''), iifNull(toString(byName('LineAddress3')), '')),
iif(!isNull(toString(byName('Address2'))) && !isNull(toString(byName('Address1'))) && !isNull(toString(byName('City'))),
concat(iifNull(toString(byName('Address2')), ''), iifNull(toString(byName('Address1')), ''), iifNull(toString(byName('City')), '')),
iif(!isNull(toString(byName('City'))) && !isNull(toString(byName('Address2'))),
concat(iifNull(toString(byName('City')), ''), iifNull(toString(byName('Address2')), '')),
''
)
)
)
Thanks! :)