==>in the B+ tree values occur only in leaf node but keys can be occur any where in the B+ tree
now here first we note down that
==> the key present in the any non leaf should also be present in the leaf node but reverse is not true
==> in the leaf node each key is associated with a value and this is known as keys value pair
==> each key value pair occur only once in the leaf nodes and that values will point to the records
==> maximum numbers of key value pair present in any leaf node is called degree of the leaf nodes in the B+ tree