Consider the following selection statement where X is an integer test score between 0 and 100.
input X
if (0<=X and X<49)
Output "you fail"
Else if (50<=X and X <70)
Output "your grade is" X
Output " you did OK"
Else if (70<=X and X<85)
Output "your grade is"X
Output "you did well"
Else if (85<=X and X<100)
Output "your grade is X
Output "You did great"
Endif
Output "how did you do?"
What will be printed if the input is 0?
"What will be printed if the input is 0?"
As a programmer, you would following each statement of the if-then-else statement and see where the conditions will be satisfied. Follow what it does (prints) after that.
If you start from the top, you won't have very far to go before you find the answer if someone gets a zero (i.e. X=0).
I am still unaware of the answer.
100.
"
100 input X
200 if (0<=X and X<49)
300 Output "you fail"
400 Else if (50<=X and X <70)
500 Output "your grade is" X
600 Output " you did OK"
700 ....
"
What will be printed if the input is 0?
You have input the value of X in line 100. It will then execute line 200.
After line 200 has been executed, if the input value of X = 0, which is the next line the program will execute?
Make a guess from the context if you have to.
The if-then-else statement branches according to the condition tested.
In the case of line 200, it tests the value of x=0, if the condition is true, it will execute the next statement (and then jump to after the endif statement), otherwise it goes to the next else or elseif statement, and so on.
If you need more details, explain where the problem is, or explain how you think it works, so we can better help you.
To determine what will be printed if the input is 0, we need to follow the logic of the selection statement.
1. First, we input the value of X. In this case, X is 0.
2. Next, we check the conditions starting from the first "if" statement.
Here are the conditions and their respective outputs:
- 0 is not greater than or equal to 0, so the condition "(0 <= X and X < 49)" is false.
- Since the first condition is false, we move on to the next condition.
- 0 is not greater than or equal to 50, so the condition "(50 <= X and X < 70)" is false.
- Since the second condition is also false, we move on to the next condition.
- 0 is not greater than or equal to 70, so the condition "(70 <= X and X < 85)" is false.
- Since the third condition is false, we move on to the next condition.
- 0 is not greater than or equal to 85, so the condition "(85 <= X and X < 100)" is false.
Since none of the conditions are true, the corresponding outputs within the conditions will not be executed.
After checking all the conditions, the code will reach the "Endif" statement.
- Then, it will output "how did you do?" as it is outside any condition and will always be executed.
In summary, if the input is 0, the following will be printed:
"how did you do?"