Correct option is C
To evaluate the given conditional statement:
if (m == 20 - 10 || n > 10)
Here is the breakdown of the order of operations:
1. Subtraction (-): The first operation performed is the subtraction 20 - 10. This is the most straightforward, as it happens first in the expression.
2. Comparison (==): Next, the equality operator == is evaluated to check if the value of m equals the result of 20 - 10.
3. Comparison (>): The greater-than operator > checks whether the value of n is greater than 10.
4. Logical OR (||): Finally, the logical OR || operator is evaluated. Since the logical OR short-circuits (i.e., if the first condition is true, the second condition is not evaluated), it will combine the results of the two comparisons (m == 20 - 10 and n > 10).
Information Booster:
1. Subtraction (-):
o The subtraction operator - is performed first according to the precedence of operators in C++.
o This evaluates the expression 20 - 10 before proceeding to the next operators.
2. Equality Check (==):
o The equality operator checks whether m is equal to the result of the subtraction (20 - 10).
o If m == 10, the condition evaluates as true, and if not, it evaluates as false.
3. Greater-than Check (>):
o The greater-than operator checks whether the value of n is greater than 10.
o This operation happens after the equality check because it has lower precedence than both subtraction and equality.
4. Logical OR (||):
o The logical OR operator || is evaluated last.
o It will return true if either of the two conditions (m == 10 or n > 10) is true. If both conditions are false, the result will be false.
Additional Knowledge:
• Operator Precedence: The order of operations in C++ follows a strict hierarchy where arithmetic operators (like -) have higher precedence than comparison operators (==, >), which in turn have a higher precedence than logical operators (||).
• Short-circuiting in Logical OR (||):
o The logical OR operator (||) short-circuits, which means that if the first condition is true, the second condition is not evaluated.
o This behavior can improve efficiency by skipping unnecessary operations.