What They Never Told You About Programming - Part 4

Computer Science Level 2

Graham has written a "dump" function to sell all the shares of his tech stocks in case of bad news in the market. However, he hasn't tested his code, and he's made an important mistake: 

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    tech_stocks=["AAPL","IBM","GOOG","ORCL","HPQ"]      
    for stock in 1,2,3,4,5:     
        sell_shares(tech_stocks[stock])

Why will this code fail?

There is a problem but it's not listed in the other choices The brackets are incorrectly nested There is a syntax error in the for loop The index is out of range of the list

Chung Gene Keun by Chung Gene Keun , 42, USA

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3 solutions

Eddie The Head
Apr 11, 2014

List index starts from 0 and for 5 elements it must go from 0 to 4 but in this case the value 5 has been used an hence the code will result in an index error .....

11 Helpful 0 Interesting 0 Brilliant 0 Confused

Ya! it's true Eddie Guerrero!

Mayank Holmes - 7 years, 1 month ago
Amit Patel
Apr 16, 2014

index for a list start from 0, so for 5 element index will be 0 - 4 , but the loop value is from 1 - 5 is used , hence code will result an error index out of range ...

2 Helpful 0 Interesting 0 Brilliant 0 Confused

true

Angga Pranata - 7 years, 1 month ago
Dhruv Patel
Apr 13, 2014

This is an index Issue as it starts with 0 and should end with 4. Its a syntax mistake and the code will not run. !

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Not all programming languages are zero-indexed. Are we assuming a particular programming language here?

Pu li - 7 years, 1 month ago

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