ENGR 102 review

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power/exponent

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integer division - division without remainder

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modulus - remainder from division

from math import*

allows us to use more math functions

sqrt(x)

square root

exp(x)

e^x

what do we have to take in consideration with trig functions? 

trig functions take in radian values not degrees

are integers a type of variable?

yes like 1 and -1

are floats a type of variable?

yes like 1.0 and - 2.0

ae Booleans a type of variable?

yes but only True and False

are strings a type of variable?

yes like “Howdy!”

how to convert value to integer

int(value)

how to convert to a float 

float(value)

how to convert to a string

str(value)

how to convert into a true Booleans

bool(value) except 0, 0.0, and empty

how to convert into a false Booleans

bool(value) but has to be 0, 0.0, and empty

==

equality

!=

inequality

<, <=

less than, less than or equal to

>,>=

greater than, greater than or equal to

what are the 3 Boolean operators

not, and, or

A and B

True if both A and B are True

A or B

True if either A or B are True

not A

reverse so if A is true it is false

conditional statements

if <condition>:

tab <do this>

when does the code indented inside happens 

if the condition is true 

if-else

use when there are 2 possibilities

if-elif-else

use when there are more than 2 alternative paths 

While loop

while <condition>:

tab <do this>

what does the while loop do

Repeats the indented code until the condition is False 

For loop

i = 0

for i in range <condition>:

tab <do this>

what does the for loop do?

Repeats the indented code a specific number of times whether the condition is true or false. 

why are comments necessary 

clarify your code, computation, and purpose 

Typical test cases

test for common possible errors within code 

edge or corner test cases

test special error cases that would be less common

loop keyword, break, does what

exits the loop

loop keyword, continue, does what

skips to next iteration

range(i, n, j) define each letter

i = starting value

n = stopping value

j = step “jump” value

how do get a certain rounding in an f-string

f”{variable:.#f}”)

len(list)

length of list

min(list)

minimum value in the list

max(list)

maximum in the list

sum(list)

sum of all variables in the list 

list.index(val)

finds the index of the first element in the list whose value matches val

list.count(val)

finds the number of occurrences of the val in the list 

list[start: end]

allows you to collect certain values in a list 

lists

<list name> = []