How bad is SLOC (source lines of code) as a metric? [closed]

Answer 1

Show them the difference between:

for(int i = 0; i < 10; i++) {
    print i;
}

and

print 0;
print 1;
print 2;
...
print 9

And ask them whether 10 SLOC or 3 SLOC is better.

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In response to the comments:

1. It doesn't take long to explain how a for loop works.

2. After you show them this, say "we now need to print numbers up to 100 - here's how you make that change." and show how much longer it takes to change the non-DRY code.