Question

differentiate between a numeric and alphanumeric constant​

Answer 1

The string constants are always enclosed in double quotes, while character constants are enclosed in apostrophes (single quotation marks). A character constant has an equivalent integer value, whereas a single-character string constant does not have an equivalent integer value.

Answer 2

Numeric is 0,1,2,3,4,5,6,7,8,9 

Alpha numeric is 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,... 

nothing more - no signs or arithmetic symbol lke + - ÷ ¢ ± ˆ † etc

Alphanumeric is a related term of numeric.


As adjectives the difference between alphanumeric and numeric

is that alphanumeric is consisting of, or limited to, letters and/or numbers, especially the characters a to z (lowercase and uppercase) and while numeric is of, or relating to numbers, especially the characters. 

As nouns the difference between alphanumericand numeric

is that alphanumeric is an alphanumeric character while numeric is (mathematics) any number, proper or improper fraction, or incommensurable ratio.