ENCMP 100 - TOPIC 2

What is input in programming?

Data that enters a program (often from the keyboard/user).

• Stuff you type into the program (Spyder Script)

What does input() do?

Reads one line from standard input (keyboard) and returns it.

• Data that enters a program (often from the keyboard/user)\

• Stuff that you type into the program

What type does input() return by default?

A string

What does print() do?

Displays output to the standard output (console)

• Stuff the program shows you

What does sep do in print()?

sets the separator between items

• what goes between things

What does end do in print()?

sets what prints at the end

• what happens at the end

Syntax Error

Python/Spyder can’t run at all

• program never starts

Types of Syntax Errors

1. Miss-capitalization

2. Leaving out quotes

3. Mismatching quotes

4. Not matching brackets

Syntax Error: Miss-capitalizing a word

Using the wrong letter case for Python keywords or functions

• ex) Print("Hello World!")

  • “Print” is not defined

  • Must be “print”

Syntax Error: Leaving out quotes

Texts must be enclosed in quotation marks; missing out causes an error.

• ex) print("Hello World!)

  • Missing the last “ after !

  • This string never ends

Syntax Error: Mismatching quotes

A string must start and end with the same type of quotation mark

• ex) print("Hello World!')

  • “ does not match with ‘

Syntax Error: Not matching brackets

Every opening bracket or parenthesis must have a corresponding closing one

• ex) print("Hello"

  • Missing )

What is a logic (runtime) error?

An error that occurs while the program is running, even though the syntax is correct

• Python understands your code, but something goes wrong when it runs

Types of Logic (Runtime) Errors

1. Dividing by zero

2. Wrong output (typo/wrong logic)

3. Forgetting to output something

4. Using the wrong calculation or operation

Logic (Runtime) Error: Dividing by zero

The p