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Questions and Answers
What does the code snippet total = 0;
do?
What does the code snippet total = 0;
do?
- Initializes the variable total to zero (correct)
- Calculates the sum of numbers
- Declares the variable total
- None of the above
What is the purpose of the for loop in the provided code?
What is the purpose of the for loop in the provided code?
To compute the sum of the cubes of the first n whole numbers and store it in total.
The variables k and total can be used freely along with n in the loop.
The variables k and total can be used freely along with n in the loop.
True (A)
In the loop, the variable ______ is used as the iteration counter.
In the loop, the variable ______ is used as the iteration counter.
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Study Notes
Task Overview
- Initialize an integer variable
n
to a positive value, representing the count of whole numbers to process. - Declare integer variables
k
andtotal
for use in a loop and to store the sum, respectively.
Code Explanation
- Start by setting
total
to zero to prepare for accumulation of results. - Use a
for
loop that iterates from1
ton
:- On each iteration, calculate the cube of the current index
k
. - Add the cube of
k
tototal
.
- On each iteration, calculate the cube of the current index
- No additional variables should be introduced beyond
n
,k
, andtotal
.
Purpose and Functionality
- The program calculates the mathematical sum of cubes for the first
n
whole numbers. - This can be expressed mathematically: ( \text{Total} = 1^3 + 2^3 + ... + n^3 ).
- The approach efficiently computes this sum using the basic features of loops and arithmetic in programming.
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