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In this video we'll recap what you've learned by creating a program for messaging a student based on grade level and final grade average.
Comments
//Students class average <70%:
//Dear Alena Holligan,
//We look forward to seeing you at summer school, beginning July 1st!
//Student class average >=70% and current grade 9
//Dear Alena Holligan,
//Congratulations on completing your freshman year in High School! We’ll see you on September 1st for the start of your sophomore year!
//Student class average >=70% and current grade 10
//Dear Alena Holligan,
//Congratulations on completing your sophomore year in High School! We’ll see you on September 1st for the start of your junior year!
//Student class average >=70% and current grade 11
//Dear Alena Holligan,
//Congratulations on completing your junior year in High School! We’ll see you on September 1st for the start of your senior year!
//Student class average >= 70% and current grade 12
//Dear Alena Holligan,
//Congratulations! You’ve graduated High School! Don’t forget to come back and visit.
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Fabulous work learning
all about conditionals.
0:00
In this section,
0:03
we covered the many different operators
needed to create descriptive conditionals
0:04
including comparison operators,
negation operators, and logical operators.
0:08
We use those conditionals to create nested
and combine if statements, and we explored
0:13
the use of a switch statement to compare
a single expression to multiple values.
0:18
Let's recap what you've learned
by creating a program for
0:23
messaging a student based on the grade
level and final grade average.
0:26
Let's create a new file named school.php.
0:32
Again start with our php tags and
0:41
we're ready to map out what
we're going to be doing.
0:43
So let's start with comments.
0:47
I'll add these in the teacher's notes so
you don't have to type everything.
0:49
If student's class
average is less than 70%,
0:52
we're going to send a message that says,
dear Alena Holligan,
0:55
we look forward to seeing you at
summer school beginning July 1st.
0:59
If the student's class average
is greater than or equal to 70,
1:03
and the current grade is 9,
the message will read,
1:07
congratulations on completing your
freshman year in High School!
1:10
We'll see you on September 1st for
the start of your sophomore year!
1:14
If the student's class average is
greater than or equal to 70% and
1:18
the current grade is 10,
the message will read,
1:22
congratulations on completing
your sophomore year.
1:25
And if the current grade is 11,
1:29
congratulations on
completing your junior year.
1:31
And finally, if the current grade is 12,
1:35
congratulations you've
graduated high school.
1:37
Don't forget to come back and visit.
1:40
The variables we need
are first name as a string,
1:42
Last name, Also as a string.
1:49
Current grade, As an integer.
1:55
And our final average.
2:01
Also as an integer.
2:05
Then we'll need a variable for
our message body.
2:07
This will be a string as well.
2:13
Let's start with a check to make
sure that we have the values for
2:15
the required variables.
2:18
If not firstName or
2:20
not lastName,
2:25
We want to echo,
Please enter a student name.
2:32
Let's run our script.
2:39
We see, Please enter a student name,
because our firstName and
2:46
lastName variables have an empty
string assigned to them.
2:49
Great, let's add Alena Holligan.
2:53
The next thing we want to do is make sure
that the current grade is between 9 and
3:01
12 for high school students.
3:06
So we'll add, elseif,
3:09
our current grade is less than 9,
3:12
or our current grade is greater than 12.
3:18
This is only for high school students.
3:28
Please enter a grade between 9 and 12.
3:36
Let's run the script again.
3:43
Now we see that we need
a grade between 9 and 12.
3:45
Let's change our current grade 9.
3:48
Next we're ready to show a message for
our students based on grade level and
3:52
final grade average.
3:56
So I'm going to put this next
section within an else block,
3:57
that displays the message.
4:00
Echo "Dear firstName lastName,
4:06
a newline character" and end the line.
4:11
Then we're also going to
echo our messageBody.
4:18
I use double quotes so
the variables are expanded.
4:25
Now we're ready to set our message body.
4:29
Within the else block, we add if
4:32
finalAverage is less than .70,
4:37
Our messageBody is going to
equal our summer message.
4:47
We can copy this from the comments above.
4:52
Else, We're going to display a different
message based on current grade.
5:04
So this is a great place
to use a switch statement.
5:12
Switch, CurrentGrade.
5:16
And then we start with our first case, 9.
5:22
Again, we can copy the message
from our comments above.
5:30
We add our break, and
then we're ready for our next case.
5:43
We can do the same things for
5:48
grades 10 through 12 copying
the text from the comments above.
5:49
There should be no way to finish this
switch statement without the current grade
5:55
equal to something between 9 and 12.
6:00
But just in case, we can add a default.
6:03
Error: Grade Level is not 9-12.
6:16
Let's run our script again.
6:27
We see this summer school message, because
the final average is less than .70.
6:31
Let's change that to .88,
And run the script again.
6:37
This time, we see congratulations
on completing your freshman year.
6:48
Congratulations on completing
this section on conditionals.
6:52
To get comfortable with conditionals,
6:56
try playing around with any of the code
we've written in this section.
6:58
Then join me in the next section and
explore the compound variable type arrays.
7:01
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