%3Cdiv%20class%3D%22c2%22%3E%3Cspan%20class%3D%22c1%22%3EExecute%20the%20program
ID: 3552055 • Letter: #
Question
%3Cdiv%20class%3D%22c2%22%3E%3Cspan%20class%3D%22c1%22%3EExecute%20the%20program%3B%20why%20does%20it%0Aproduce%20the%20output%20it%20gives%3F%3C%2Fspan%3E%3C%2Fdiv%3E%0A%3Cdiv%20class%3D%22c2%22%3E%3Cbr%20%2F%3E%3C%2Fdiv%3E%0A%3Cdiv%20class%3D%22c2%22%3E%0A%3Cdiv%3Ebool%20powerOfTwo%20(int%26amp%3B%20number)%3C%2Fdiv%3E%0A%3Cdiv%3E%20%7B%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3Bint%20remainder%20%3D%20number%20%25%202%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%2F%2F%20division%20by%202%0Aleaves%20only%200%20or%201%20as%20remainder%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3Bwhile%20(remainder%20%3D%3D%200)%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%2F%2F%20why%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3B%7B%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20number%20%2F%3D%202%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%2F%2Fwhy%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20remainder%20%3D%20number%20%25%202%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%2F%2Fwhy.%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3B%7D%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3Breturn%20number%20%3D%3D%201%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%0A%26nbsp%3B%20%2F%2F%20false%3C%2Fdiv%3E%0A%3Cdiv%3E%26nbsp%3B%20%26nbsp%3B%3C%2Fdiv%3E%0A%3Cdiv%3E%7D%3C%2Fdiv%3E%0A%3Cdiv%3E%3Cbr%20%2F%3E%3C%2Fdiv%3E%0A%3C%2Fdiv%3E%0AExplanation / Answer
int remainder=number%2;
checks if the number if it is even or odd
if it is odd there is no need to check further as it will return false due to statement ( return number==1)
if it is even it is divided by 2 till it is possible i.e number/=2;
however number like 6 will after first call have number value as 3 and remainder value as 1 and thus while loop will break
the final statement makes sure that the function returns true only when number=1
number=1 is possible in only 2 cases
1) when the number entered is1
2) number entered is power of 2 so that it is divided by 2 until the value of number reaches 1
for every other number (odd and multiple of 2 that are not power of 2) it returns false.
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