Explanation and function
1. Text slightly lower than other text in the same line.
Subscripts are often used in scientific formulas.
2. Symbols for lower corner marks; A subscript symbol, especially one that plays a different role in the same category [1]
Commonly used small print is printed or written slightly lower than other symbols, but not immediately below it
such as Sodium bisulfate Of chemical formula : In NaHSO ₄, the number 4 is the subscript three high-level language An operation of, often used in indexing. For example, in C++ Medium, string Objects support subscript operations, Operator S [n], where n counts from 0, representing the n+1 character of the s object; Vector/array is the n+1 element. Modern languages tend to use iterators rather than subscripts (only for containers), even for subscripts/ iterator The vector object of the. 4. In the symbol input of Word documents, the character codes from 2080 to 208E are subscripts, including ₀ ₁ ₁ ₄ ₄ ₇ ₈ ₉ ₊ ₋ ₍ ₎, etc. Common shortcut keys Ctrl+=Enter subscript status, and then click to enter Normal state 。 5. On HTML Language, the subscript tag name is sub. 
