Assume that x is a char variable has been declared and already given a value. Write an expression whose value is true if and only if x is an hexadecimal (Base 16) digit (0-9 plus A-F or a-f).

LANGUAGE: Java

CHALLENGE:

Assume that x is a char variable has been declared and already given a value. Write an expression whose value is true if and only if x is an hexadecimal (Base 16) digit (0-9 plus A-F or a-f).

SOLUTION:

if((x>='0' && x<='9') || x='A' || x='B' || x='C' || x='D' or x='E' or x='F' or x='a' || x='b' || x='c' || x='d' || x='e' || x='f')
x='T'