variable
A symbol is a letter or picture used to stand for something else.
A symbol used for counting is a "number." Perhaps the "d" is incorrect.
A variablẹ
A variable
number
A symbol used for counting is a number. Check if the D is correct.
It is called a variable
That is called a variable. A letter is often used.
It is a variable
a variable
When you do not know the value of a particular number, the most usual symbol used in place of that number is the letter x.
In the default font used by Excel, a letter refers to any alphabet character, a number refers to any numeric character, a symbol refers to special characters like %, $, &, etc., and a punctuation mark refers to symbols like !, ?, comma, period, etc.