set col to be in middle row bootstrap code example

Example 1: how to have only one vertical border after a column in bootstrap table

table.table tbody tr td,
table.table thead tr th,
table.table thead {
  border-left: 1px solid red;
  border-right: 1px solid red;
}

Example 2: script to add value of 2 coulms of grid and show result in 3rd column

script to add 2 column value of grid and shown in 3rd column