Model $1$for$$ Statements

A for loop executes the same block of code "for each item in a sequence". Create a new file in Python named loops.py$,$ and enter the following code:

print $("$hello$")$

for x in $[2,7,1]$:

print $("$the number is$",$ x$)$

print $("$goodbye$")$

$1.$ Run the loops.py program. How many times does the indented line of code execute under the for loop?

$2.$ How many times does the line of code NOT indented execute after the for loop?

$3.$ Identify the value of x each time the indented line of code is executed.

a$)1$st time:

b$)2$nd time:

c$)3$rd time:

$4.$ Modify the list $[2,7,1]$ in the following ways, and rerun the program each time. Indicate how many times the for loop executes.

a$)$ non$-$consecutive numbers: $[5,-7,0]$

b$)$ numbers decreasing in value: $[3,2,1,0]$

c$)$ all have the same value: $[4,4]$

d$)$ single value in a list: $[8]$

$5.$ In general, what determines the number of times that the loop repeats?

$6.$ What determines the value of the variable x$?$ Explain your answer in terms of what is assigned $($x $=...)$ each time the loop runs.

$7.$ Modify the program as follows:

a$)$ Write a statement that assigns $[0,1,2,3,4]$ to the variable numbers.

b$)$ Rewrite the for x $...$ statement to use the variable numbers instead.

c$)$ Does the assignment need to come before or after the for statement?

$8.$ Add the following code at the end of your program:

for c in $"$Hi$!"$:

print $($c$)$

a$)$ What is the output of this for statement?

b$)$ What determined how many times print $($c$)$ was called?

c$)$ Explain what a for statement does with strings.

$9.$ What other data types $($besides lists and strings$)$ can a for loop handle? Experiment by adding examples to your loops.py program. Summarize here what works and what doesn$$t$.$