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- Interview Questions and Answers for 'If else' - 1 question(s) found - Order By Newest

Q1. What is the difference between following two if blocks ?

if(x < 10)
do this;

else if(x > 10)
do that;

else
do this and that;

if(x < 10)
do this;

if(x > 10)
do that;

if(x == 10)
do this and that;

Ans. Though Logically both code segments are same, but first one is more efficient as the 3 checks are mutually exclusive. In second code segment, all conditions will be evaluated no matter what and will never result in short circuit. In first segment , max 2 conditions will be checked if x >= 10.

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