Temp

Question

How
temp=7
temp+=2 hives the output 72

Answer 1

temp = '7'
temp += '2'
print temp

The above will output 72 because the values are strings and are being concatenated together, not added mathematically.

temp = 7
temp += 2
print temp

This will output 9 as 7 and 2 are now numbers and mathematical calculations can occur.

Answer 2

7 and 2 are of type int, not string, so answer cannot be 72, only when '7' and '2' are used then you get '72'