Coding Blunders Demystified

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Common Coding Mistakes and How to Avoid Them
In this presentation, we'll go over some of the
most common coding mistakes and show you how to
avoid them. Whether you're a beginner or an
experienced programmer, there's always something
to learn, so let's get started.
by Kritika Ramone
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Data Type Errors
String and Number Types
Boolean Logic
Type Conversion
Using poor boolean logic can lead to incorrect
results. Use well-formed boolean expressions and
learn truth tables to avoid data errors.
Assigning incompatible types can cause run-time
errors. Use type casting to prevent unexpected
output and maximize program efficiency.
Unmatched data types can cause unexpected errors.
Convert input types to prevent errors and improve
code quality.
Data Validation
Invalid user input is common. Validate data
inputs using built-in or custom functions to
prevent errors and improve program security.
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Syntax Errors
Misspelled Variables
Misspelling a variable can cause syntax errors.
Spell variables correctly to avoid run-time
errors.
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Missing Semicolons
Not Indentation
Missing a semicolon can cause syntax errors. Use
semicolons in the correct places to improve code
quality.
Not indenting code can make it hard to read and
cause syntax errors. Indent code to make it more
readable and catch syntax errors faster.
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Logic Errors
Unexpected Output
Incorrect Output
Use debugging tools to identify logic errors. Use
flowcharts to help you design and plan your
program to avoid these errors in the first place.
Code that does not produce the correct output.
Use algorithms to break down complex problems and
simplify them, and pair programming to identify
multiple possible solutions.
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Code Redundancy
Repeated Code
Long Functions
Unnecessary Comments
Repeated code can be a sign of poor programming
practices. Consolidate repeated code blocks into
one reusable function.
Long functions can be hard to read and maintain.
Break up long functions into smaller reusable
units and test them separately.
Comments can become irrelevant or misleading over
time. Comment only where necessary and use
self-documenting code.
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Poor Debugging Practices
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Debugging with Print
Using print statements for debugging can be
time-consuming. Use debugging tools like
breakpoints and step-through to debug more
efficiently.
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Debugging Late
Debugging errors too late can lead to more
errors. Debug code regularly and keep your code
well-documented.
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Not Tracking Changes
Not tracking your code changes can cause
headaches when bugs pop up. Use version control
and commit regularly to keep track of the changes.
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Common Coding Mistake and How to Avoid it
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Thank You For Watching