STRING MANIPULATION (PYTHON)

what is a string?

For string symbol + means........................

What is the output of the following code?
str1='101'
x=int(str1)
z=x+400
print(z)

What are the lengths of the strings 'kiwi' and 'strawberry'?

index of a string begins with

slicing string X="BOnVoyage"
print X[0:5]

Slicing string
x="BOnvoyage"
print(x[4: ])

"help" in "a="god help those who help themselves""

What is the output of the following Python function?
```python
s=lower("INDIA")
print(s)
```