Engr 102 - Exam 1 Review

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Exam (elaborations)

Engr 102 - Exam 1 Review

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2024/2025

Institution Engr 102 -

Course Engr 102 -

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What do variables do? A variable store something (value, object, whatever) What are the rules for variable naming? 1. Can't start with numbers 2. Can't use key words 3. No spaces Place 'good' next to each of the following good variable names. Place 'bad' next to the bad ones: 1. var 2. total_number_of_students_in_the_room_ZACH_210 3. sum 4. Maclaurin’s 5. initial. Position 6. 36_array 7. Big chonk 1. bad (has keyword) 2. bad (too long) 3. bad (keyword) 4. good 5. bad (can't have a period) 6. bad (can't have numbers) 7. bad (starts with upper case, meme name) What would be the following output? a = 21 b = (a + 4) // 7 #division with no remainder c = a % 5 #gives you remainder print(b) print(a) ################### x = 3 y = x x = 4 print(y) 3 1 ##### 3 List the four main data types and some examples of each 1. Strings (bananas, '71', 'Howdy') 2. Integer (3,4,-21,22) 3. Float (4.0, 7.1, -23.45, 100.99) 4. Boolean (True, False) Data type: tuple An immutable container with ordered elements How do you change the type of variable? Typecasting. Use the desired type and then some parenthesis Ex. .float('72.6') return 72.6 List the three main conversion specifiers and write what the code would output 1. .d #substitutes an integer 2. .f #substitutes a float 3. .s #substitutes a string EXAMPLE: List the three main conversion specifiers and write what the code would output print("I told her %d times that I have a %.2f percent success rate with any %s." % (7, 92.8, dog) I told her 7 times that I have a 92.80 percent success rate with any dog What happens when you use the addition operator on two strings? '12' + '12" = ? 1212 How do you get a user to enter a string, integer, float, boolean? 1.String user_string = input("Enter a string: ") 2.Integer user_integer = int(input("Enter a integer: ")) 3.Float user_float = float(input("Enter a float: ")) 4.Boolean = int(input("Enter 0 for false or 1 for true: ")) MATH - Operators 1. + 2. - 3. * 4. / 5. // 6. ** 7. % 1. addition 2. subtraction 3. multiplication

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Engr 102 - Exam 1 Review
fr fr fr fr fr

Whatfrdofrvariablesfrdo? Afrvariablefrstorefrsomethingfr(value,frobject,frwhatever)
Whatfrarefrthefrrulesfrforfrvariablefrnaming? 1.frCan'tfrstartfrwithfrnumbers
2.frCan'tfrusefrkeyfrwords
3.frNofrspaces
Placefr'good'frnextfrtofreachfroffrthefrfollowingfrgoodfrvariablefrnames.frPlacefr'bad'frnextfrtofrthefrbadfrones:
1.frvar
2.frtotal_number_of_students_in_the_room_ZACH_210
3.frsum
4.frMaclaurin’s
5.frinitial.frPosition
6.fr36_array
7.frBigfrchonk 1.frbadfr(hasfrkeyword)
2.frbadfr(toofrlong)
3.frbadfr(keyword)
4.frgood
5.frbadfr(can'tfrhavefrafrperiod)
6.frbadfr(can'tfrhavefrnumbers)
7.frbadfr(startsfrwithfrupperfrcase,frmemefrname)
Whatfrwouldfrbefrthefrfollowingfroutput?

afr=fr21
bfr=fr(afr+fr4)fr//fr7fr#divisionfrwithfrnofrremainder
cfr=frafr%fr5fr#givesfryoufrremainder
print(b)
print(a)

###################
xfr=fr3
yfr=frx
xfr=fr4
print(y) 3
1
#####
3
Listfrthefrfourfrmainfrdatafrtypesfrandfrsomefrexamplesfroffreach 1.frStringsfr(bananas,fr'71',fr'Howdy')
2.frIntegerfr(3,4,-21,22)
3.frFloatfr(4.0,fr7.1,fr-23.45,fr100.99)
4.frBooleanfr(True,frFalse)
Datafrtype:
tuple Anfrimmutablefrcontainerfrwithfrorderedfrelements
Howfrdofryoufrchangefrthefrtypefroffrvariable? Typecasting.
Usefrthefrdesiredfrtypefrandfrthenfrsomefrparenthesis
Ex.fr.float('72.6')frreturnfr72.6

, Listfrthefrthreefrmainfrconversionfrspecifiersfrandfrwritefrwhatfrthefrcodefrwouldfroutput
1.fr.dfr#substitutesfranfrinteger
2.fr.ffr#substitutesfrafrfloat
3.fr.sfr#substitutesfrafrstring
EXAMPLE:
Listfrthefrthreefrmainfrconversionfrspecifiersfrandfrwritefrwhatfrthefrcodefrwouldfroutput
print("Ifrtoldfrherfr%dfrtimesfrthatfrIfrhavefrafr%.2ffrpercentfrsuccessfrratefrwithfranyfr%s."fr%fr(7,fr92
.8,frdog)
>>>Ifrtoldfrherfr7frtimesfrthatfrIfrhavefrafr92.80frpercentfrsuccessfrratefrwithfranyfrdog
Whatfrhappensfrwhenfryoufrusefrthefradditionfroperatorfronfrtwofrstrings?
'12'fr+fr'12"fr=fr? >>>1212
Howfrdofryoufrgetfrafruserfrtofrenterfrafrstring,frinteger,frfloat,frboolean? 1.Stringfr
user_stringfr=frinput("Enterfrafrstring:fr")

2.Integer
user_integerfr=frint(input("Enterfrafrinteger:fr"))

3.Float
user_floatfr=frfloat(input("Enterfrafrfloat:fr"))

4.Booleanfr=frint(input("Enterfr0frforfrfalsefrorfr1frforfrtrue:fr"))
MATHfr-frOperators
1.fr+
2.fr-
3.fr*
4.fr/
5.fr//
6.fr**
7.fr% 1.fraddition
2.frsubtraction
3.frmultiplication
4.frdivision
5.frfloorfrdivisionfr
6.frexponent
7.frmodulo
RELATIONALfr-frOperatorsfr
1.fr==
2.fr!=fr
3.fr>
4.fr<
5.fr>=
6.fr<= 1.frequal
2.frnotfrequal
3.frgreaterfrthan
4.frlessfrthan
5.frgreaterfrorfrequalfrthan

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Uploaded on: October 21, 2024
Number of pages: 6
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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