What expression can be used to represent logical "or"?

The expression that represents logical "or" is typically denoted by the symbols '||'. In programming and logical operations, the '||' operator is used to combine two boolean expressions, and it evaluates to true if at least one of the expressions is true. For example, if you have two conditions, A and B, the expression A || B will return true if either A is true, B is true, or both are true.

Other options do not represent logical "or." The term "AND" is used for conjunctions and is represented by '&&', meaning both conditions need to be true for the entire expression to be true. The word "IF" is generally used in conditional statements for flow control and does not represent a logical operator. "NOT" is used to negate a condition and is represented by '!', meaning it will reverse the truth value of the expression it is applied to. Thus, the correct representation of logical "or" is indeed '||'.