Python

Interview Questions on Python

21. How to convert int to string?

Use str()
Syntax :- 
str(number);
Ex :-
str(23); // returns ‘23’

22. How to find the type of variable?

Use type()
Syntax :- type(i)
Ex :- 
i = 123
type(i)   //type is 'int'

23. How to reverse the string?

Syntax:- stringname[::-1]
Ex: -
s = "String to reverse."
print s[::-1];

24. How to get substring?

Syntax:- stringname[start_index : end_index]
Ex :- 
>>> s = 'Hello, everybody!'
>>> s[0]
'H'
>>> s[:3]
'Hel'
>>> s[2:5]
'llo'

25. How to get character from particular position of string?

Use find()
Syntax :- string1.find(“c”); # here c for character
Ex :-
s="mystring"
s.find("r")

Output : 4

26. How to get index of the string?

Use index()
Syntax :- string1.find(“c”); # here c for character
Ex :-
s="mystring"
s.index("r")

Output : 4

27. How to write if statement?

Syntax :- 
if conditional_Statement :
     #code 
Ex: -
if weight > 50:
        print("There is a $25 charge for luggage that heavy.")

28. How to write ternary operator?

 if  else 
Ex: - 
>>> age = 15
>>> # Conditions are evaluated from left to right
>>> print('kid' if age < 18 else 'adult')
Kid

29. Is there switch statement in python?

No

30. Is there goto statement in python?

No

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