Which one of the following operators is a unary operator in c language? ans. sizeof() & && <<

1. Break Down the Problem

To identify which operator is a unary operator in C language, we need to understand what unary operators are. Unary operators are those that act on a single operand.

2. Relevant Concepts

There are several types of unary operators in C:

• Unary Arithmetic Operators: Like negation (-).
• Increment/Decrement Operators: Like ++ and --.
• Logical NOT Operator: Like !.
• Bitwise NOT Operator: Like ~.
• Sizeof Operator: Returns the size of a datatype or variable.

3. Analysis and Detail

Now, let's evaluate the options:

1. sizeof(): This is a unary operator that returns the size of its operand.
2. &: This is a bitwise AND operator when applied to two operands, but it also serves as a unary operator when used to get the address of a variable.
3. &&: This is a logical AND operator that requires two operands, making it a binary operator.
4. <<: This is a left shift operator requiring two operands, so it is also a binary operator.

4. Verify and Summarize

From the analysis, we see that sizeof() and & can be unary operators, but since & can also function in a binary context, sizeof() is the more distinct unary operator.

Final Answer

The unary operator in C language from the provided options is sizeof().