👉 In programming, a subindex is a sequence of characters that identifies the start and end of a specific part or section within an expression. These sequences are often used to denote subexpressions or subroutines in a program. For example: ``` int main(){ float f = 10; return f; } ``` The `main` function has a subindex at the beginning, denoted by `{`, and at the end, denoted by `}`. The `