Task: Operations Quiz

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Look at the following bits of code and see whether you can determine the value of a before you read the solution:

 var a = 7; a++; a--; trace("a"); 

The result is 7. 1 is added to a and then 1 is taken away.

 var a = 7; a += 6 a *= 2; trace(a); 

The result is 26. a starts at 7, changes to 13 when 6 is added to it, and then is multiplied by 2 to get 26.

 var a = 7; var b = 3; a -= b; a++; trace(a); 

The result is 5. b is subtracted from a leaving 4. Then 1 is added to a .

 var a = 22; var b = 6; var c = 13; a = b + c; a -= 2; b++; trace(a); 

The result is 17. a starts off as 22, but the value is completely replaced by b + c , which is 19. Then 2 is subtracted from a , leaving 17. The b++ changes b to 5, but does not affect a at all.

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