This code snippet initializes four variables (a
, b
, c1
, c2
) and uses nested loops to count iterations and compare values.
a
is set to 5, b
to 7, c1
and c2
are initialized to 0.c1
is incremented by 1.c2
is incremented by 1.i
and j
are equal. If they are, it prints how many times each loop has run. However, given the ranges, this condition is never met, so the print statement is never executed.a, b, c1, c2 = 5, 7, 0, 0
for i in range(20, a, -1):
c1 = c1 + 1
for j in range(0, b):
c2 = c2 + 1
if i == j:
print("How many times the loops are run?")
print(
"first loop: "
+ str(c1)
+ "\nsecond loop: "
+ str(c2)
+ " ("
+ str(c1)
+ " * "
+ str(b)
+ ")"
)
How many times the loops are run?
first loop: 15
second loop: 105 (15 * 7)
a, b, c1, c2 = 5, 7, 0, 0
a = 5
: This sets the variable a
to 5.b = 7
: This sets the variable b
to 7.c1 = 0
: This initializes the counter c1
to 0.c2 = 0
: This initializes the counter c2
to 0.for i in range(20, a, -1):
c1 = c1 + 1
range(20, a, -1)
generates a sequence of numbers starting from 20 down to (but not including) a
(which is 5), decrementing by 1 each time. So, the values of i
will be 20, 19, 18, …, 6.c1 = c1 + 1
increments c1
by 1 each time the outer loop runs. This counts how many times the outer loop executes. for j in range(0, b):
c2 = c2 + 1
range(0, b)
generates a sequence of numbers from 0 to b-1
(which is 6). So, the values of j
will be 0, 1, 2, 3, 4, 5, 6.c2 = c2 + 1
increments c2
by 1 each time the inner loop runs. This counts how many times the inner loop executes. if i == j:
print("How many times the loops are run?")
print(
"first loop: "
+ str(c1)
+ "\nsecond loop: "
+ str(c2)
+ " ("
+ str(c1)
+ " * "
+ str(b)
+ ")"
)
if i == j
checks if the current values of i
and j
are equal. If they are, it executes the print statement.print
statement outputs the number of times the outer loop has run (c1
) and the number of times the inner loop has run (c2
). It also shows that c2
is equal to c1
multiplied by b
(since c2
is incremented b
times for each outer loop iteration).a = 5
, b = 7
, c1 = 0
, c2 = 0
.i = 20
and decrements until i > 5
.c1
increments with each iteration of the outer loop.j = 0
to j = 6
for each value of i
in the outer loop.c2
increments with each iteration of the inner loop.i
and j
, the condition if i == j
is checked.i
from 20 to 6 and j
from 0 to 6), the condition i == j
will never be true because the ranges do not overlap. Therefore, the print statement will never be executed.Since the conditional statement if i == j
will never be true given the ranges of i
and j
, the print statement inside the conditional block will not be executed.
However, if we are to determine how many times the loops would run in total:
20 - 6 + 1
).Therefore:
c1
will be 15 after the outer loop finishes.c2
will be 15 * 7 = 105
after all iterations of the inner loop.Even though the print statement is never executed due to the ranges of i
and j
, this demonstrates how to count the number of loop executions using counters.