what is a placeholder
Answers
Place Holder
Something used or included temporarily or as a substitute for something that is not known or must remain generic,That which holds, denotes or reserves a place for something to come later.
Purpose of Placeholder
In computer programming, a placeholder is a character, word, or string of characters that may be used to take up space until such a time that the space is needed.
Example
A programmer may know that she needs a certain number of values or variables, but doesn't yet know what to input.
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1.
MATHEMATICS
a significant zero in the decimal representation of a number.
2.
LINGUISTICS
an element of a sentence that is required by syntactic constraints but carries little or no semantic information, for example the word it as a subject in it is a pity that she left, where the true subject is that