How do you calculate order of internal nodes in B plus -tree?

The order of internal nodes in a B+-tree refers to the maximum number of children that any internal node can have. To calculate the order, you typically denote it as ( m ). For a B+-tree of order ( m ), each internal node can have between ( \lceil m/2 \rceil ) and ( m ) children, except for the root, which can have as few as 2 children. This structure ensures balanced tree height and efficient search, insert, and delete operations.