CSE Exam 1 Study Guide

input() Rule

Whatever the use types (even numbers) will be captured as a string

Int()

Converts strings into integers (Ex. “20” becomes 20)

Float()

keeps the decimal

What happens when you you run int(“3.85”)?

The decimal will be dropped completely, does not round

What does print() do automatically?

Adds a newline character at the end

What does \” and \’ do?

Adds quotes inside print statement, or statement that already has quotes

is _score = 10 legal or illegal?

legal

is this legal or illegal? 1_place = 2

illegal

What is a single =?

assignment operator

What is a double =?

true/false statement

What is the execution rule?

Calculates RIGHT side first and stores it to the variable on the LEFT

What returns floats?

/, math.sqrt, math.pow

What returns integers (no decimal)?

floor, modulo, math.ceil, math.floor

Order of operations

Parentheses, exponents, multiplication, addition

what is x += 5

x = x + 5

What is x *= 2

x = x * 2

What is x %= 4

x = x % 4

What does random.randint include?

Both start and stop

what does random.randrange include?

Start but not stop

What is random()

float between 0 and 1

What is random.uniform?

Gives decimal values between the ranges

What two math symbols do strings work with?

+(join) and *(repeat)

What does print(len(“hello!”)) do?

output: 6 (counts amount of characters)

What does print (python[0]) do?

output: p (prints the first character of the word)

What do you need to be aware of when using math.sqrt and math.pow?

They always return floats, even if the result is a whole number

What is a explicit conversation?

Manually using int(), float(), or str()

Syntax Error

Violates python grammar rules before running

Runtime error

occurs while the program is running (Ex. dividing by 0)

indentation error

lines arent being properly indented

value error

invalid value is used (ex. using letters in int())

name error

trying to use a variable that does not exist

type error

When performing an operation on a data type that doesn’t support it (Ex. 5 + “apples”)

Logic errors

program runs properly but the output is incorrect due to human error

math.ceil

rounds UP to nearest integer

math.floor

rounds down is nearest integer

math.pow

puts x to the power of y (x,y) (ex. (2, 3) = 8)

math.fabs

absolute value