latex double subscript

To add double subscripts in LaTeX for C++ language, follow these steps:

1. Use the underscore character (_) to indicate the beginning of a subscript.
2. Enclose the subscript in curly braces to ensure it is properly formatted.
3. Repeat the underscore and curly braces for the second subscript.

For example, to represent a double subscript in LaTeX for a C++ variable, use the following syntax:

a_{i_{j}}