Coding challenges on control flow: branching and loops

Problem 1The for Loop and range()

Sum a Range of Integers

Assume you are given an integer variable named n (you may assume n is at least 1). Create a variable named total that holds the sum of all integers from 0 up to and including n - 1 — that is, 0 + 1 + 2 + ... + (n - 1).

Use a for loop together with range.

n = 10

n = 10

Scratchpad— run any Python to test ideas

# Scratchpad — run any Python here to test ideas.
# Anything you write below stays separate from the problem's tests.

print("hello, world")

# Scratchpad — run any Python here to test ideas.
# Anything you write below stays separate from the problem's tests.

print("hello, world")

Python runtime ready in a moment

Visible tests · 2Examples — click to expand

total is an integer

total equals 45

Hidden tests · 3Bodies hidden — pass/fail only

Hidden test 1

Hidden test 2

Hidden test 3