CS-110: Fundamentals of Programming

CS-110 is Southern New Hampshire University's course for learning to program from the ground up, with no previous coding experience assumed.

SNHU's catalog describes it as covering the fundamentals of programming using a modern programming language. Students are introduced to data types, variables, decision statements, iterative statements, subprograms and parameter passing, and arrays, and gain problem-solving skills by developing many simple computer applications. It is a 3-credit undergraduate course with no listed prerequisite.

The hardest part is rarely syntax. It is learning to break a problem into small, precise steps a computer can follow, then finding out why the program does something different from what you meant.

What CS-110 Covers

Key Concepts Explained

The examples below use Python-style code for readability; your section may use a different language, but the ideas carry over.

Decisions

A decision statement tests a condition and runs one block or another. Order matters when conditions overlap.

if score >= 90:
    grade = "A"
elif score >= 80:
    grade = "B"
else:
    grade = "C or below"

Loops and Accumulators

Many beginner problems combine a loop with a running total or counter.

total = 0
for s in scores:
    total = total + s
avg = total / len(scores)

Subprograms and Parameter Passing

A function packages a task so you can reuse and test it. Parameters carry data in; a return value carries the result out.

def area(width, height):
    return width * height

print(area(3, 4))  # 12

Arrays

Arrays (or lists) hold many values under one name, accessed by index. In most languages the first index is 0, so the last item in a list of five is at index 4.

A Reliable Way to Write Any CS-110 Program

1. Restate the problem: inputs, outputs and rules in your own words.
2. Work one example by hand: if you cannot do it on paper, the computer cannot either.
3. Write pseudocode: plain-language steps before real code.
4. Code a little, run a little: test after every few lines.
5. Test edge cases: zero, negative numbers, empty input, the largest value.
6. Comment and tidy: clear names and short comments explaining why.

Typical Assignments and How to Approach Them

Worked Example: From Problem to Program

Here is how the method above plays out on a typical beginner task: "Ask the user for five temperatures and report the highest, the lowest and how many were below freezing."

• Inputs and outputs: five numbers in; three results out.
• By hand: for 3, -2, 7, 0, -5 the highest is 7, the lowest is -5 and two are below 0.
• Pseudocode: read the first value into high and low; loop over the rest, updating high and low; count values below 0.

temps = read five numbers
high = temps[0]
low = temps[0]
below = 0
for t in temps:
    if t > high: high = t
    if t < low: low = t
    if t < 0: below += 1

Where Students Get Stuck

• Off-by-one errors. Loops that run one time too many or too few. Check the first and last iteration by hand.
• Integer versus decimal division. Some languages drop the decimal part when dividing whole numbers.
• Writing everything at once. Large untested blocks hide bugs; build in small steps.
• Reading error messages. The line number and message usually point straight to the problem.

Study Tips for CS-110

• Type examples yourself rather than copying and pasting; it builds muscle memory.
• Keep a log of errors you hit and how you fixed them.
• Practice small extra problems on each topic before the graded one.
• Ask "what is the value of each variable right now?" whenever you are confused.

How We Help with CS-110

Send the assignment prompt, starter files, your current code and any feedback. A programming tutor can explain concepts, walk through debugging with you or prepare a commented custom solution to study. We explain the reasoning so you can write your own code.

GradeEssays is independent of Southern New Hampshire University. Our work is tutoring and reference help: you write and submit your own code under SNHU's academic integrity policy. Every order is prepared from scratch, with free revisions within the scope of your original request.