Practice Nested Loops (5.5) - Loops – for and while - Python Programming Language

Practice: Nested Loops

Lesson 5.5Loops – for and while

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9 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

1Question 1.
What is the output of the following code?
Python
for i in range(2): for j in range(2): print(i, j)
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Count how many times the inner loop runs for each iteration of the outer loop.
Question 2.
Write a simple nested loop to print a triangle of numbers with 3 rows.
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The outer loop controls the rows, and the inner loop controls the columns.
3Question 3.
What are nested loops?
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Think about how you work with multi-dimensional data.
4Question 4.
True or False: The inner loop runs completely for each iteration of the outer loop.
- True
- False
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Consider what happens with the execution flow in a nested structure.
Question 5.
Write a function that takes a 2D list (matrix) and returns the sum of all its elements using nested loops.
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You will need to initialize a total variable and use nested loops to iterate through each element.
6Question 6.
Create a pattern output using nested loops to print a right-angled triangle. For size 5, it should look like:
```
*
**
***
****
*****
```
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The outer loop controls the rows, and the inner loop will control how many stars to print in each row.

5 more questions in this section. Enroll free to practise them all.