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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Priyadarshan Choursiya
A constant is something like a "number". For example, if we talk about the function x↦ax+3, then x is a variable and a is a parameter -- and thus a constant. 3 is also a constant but it is not a parameter. A "known" variable is typically a value that the conditions of the problem dictate the variable must take. see the attachment