Python-101

Question 1

What is the syntax for squaring?

Answer 1

a**2

Question 2

How do you define vars?

Answer 2

Just use the var name and value, no keyword required

Question 3

What are keywords used in for loop?

Answer 3

for, in and : (colon sign)

Question 4

Write code to iterate the Strings?

Answer 4

for i in “Str1”, “Str2”, “Str3”:

print(“Hello”+i)

Question 5

Do we have line terminators in pyhton?

Answer 5

Nope

Question 6

What does range function do?

Answer 6

It helps is looping till the argument given
for i in range(10):
print(i)

Question 7

How can you look for help

Answer 7

Just type help(arg), in are you can pass any keyword or function, press q to exit

Question 8

Can we use parenthesis to specify the scope of the code(e.g for loop)?

Answer 8

No, Use tabs

Question 9

How does the _ use in for loop?

Answer 9

When you do not want to use a var , and just let the loop do work many times
for i in range(10):
print(“Hello”)

Question 10

How to comment?

Answer 10

Start with #

Question 11

What is diff b/w single , double and triple quote

Answer 11

No Diff between singl and double quote, but yes triple double quotes(“”””) specifes multiple lines

Question 12

What is negative indexes used for?

Answer 12

It specifies the item in reverse, -1 refers to last item , -2 second last and so on

Question 13

How do you do String slicng with index based?

Answer 13

Use : sign such as

print(str[1:4]);,

Question 14

How can you slice from 1 to second last>

Answer 14

print(str[0:-2])

Question 15

In PY are the String immutable?

Answer 15

Yes

Question 16

What is meaning of * in String context?

Answer 16

It says that if you want to repeat the string many times

Question 17

How can I find the presssence of a char in a String?

Answer 17

Use equals operator or use in, like

‘á’ in MyString this will print true

Question 18

IS it required to use if keyword

Answer 18

Nope, statement itself will do that

Question 19

What does len do?

Answer 19

len(obj) shows the length of the object

Question 20

What does enumerate do?

Answer 20

enumerate() does the iteration of any object whichhas index

Question 21

How Do you add escape character?

Answer 21

prepend with \

Question 22

How should I nullify the effect of escape char and let it get printed?

Answer 22

Use r or R like

r”the \xHH is Hexadecimal char”