Question

question: 13
what is the difference between a binary operator and a unary operator?
a computer can use binary operators, but it cannot use unary operators.
a unary operator needs two things, while a binary operator only needs one.
a binary operator needs two things, while a unary operator only needs one.
binary operators are used for arithmetic expressions, while unary operators are for strings.
question: 14
on which line of code will python error?
weight = input(\how much do you weigh? \)
oz_water = weight / 2
print(\you should drink \ + str(oz_water))
print(\ounces of water every day if you weigh \ + weight)
line 1
line 2
line 3
line 4

Explanation:

Question 13

A binary operator acts on two operands (e.g., \(a + b\), where \(+\) is the binary operator and \(a\) and \(b\) are operands). A unary operator acts on a single operand (e.g., \(-a\), where \(-\) is the unary operator and \(a\) is the operand).

In Python, the input() function returns a string. In line 2, we are trying to perform a division operation (weight / 2). Since weight is a string (from input), we cannot perform arithmetic operations on a string directly. We would need to convert the string to a numeric type (e.g., int or float) first.

Answer:

A binary operator needs two things, while a unary operator only needs one.

Question 14