Interview Questions on Loops in C : (20)

Hint:
C Language has only three loops - for, while, do while

Hint:
Always remember, a for loop with only two ; is infinite loop. And it is because there is no initialization, condition & increment/decrements

Hint:
blank for loop with ; ; is always infinite loop. printf() will never executed in this program.

Hint:
for loop should have semicolumn ; not comma , in its syntax. Using , instead of ; produces compilation error.

Hint:
C doesn't allow using preincrement & postincrement on a variable on same time like ++i++

Hint:
In this code only i is incrementing starting from 0 to 4 but j is 0 only.

Hint:
This code has 25 iterations of for loops that is why count++ is executed 25 times hence its value becomes 25.

Hint:
You might be thinking that it should print 5 times but it is printing 1 time only because for loop is terminated by ; which means for loop will run 5 times but printf() is not part of that loop.

Hint:
if we put ; after for() then for loop doesn't run anything which is inside {}

Hint:
while(1) means while will run for forever it also means while(true)

Hint:
While(1) is always infinite loop in C programming. So while will run but since it is terminated by ; and printf() is not part of it.

Hint:
Here while loop is evaluated as while(0) which means while loop will not be executed.

Hint:
while(0==0) is evaluated as while(1) which means while loop is execuated infinite times

Hint:
Here while loop is evaluated as while(0) because it has a post increment operator and a is incremented later after while loop. While(0) means loop will not run.

Hint:
Here while loop is evaluated as while(0) because it has post increment operator. And since while(0) is terminated by ; so printf() will not be part of it and hence it is printed 1 time.

Hint:
We can't use preincrement and postincrement operator same time on same variable.

Hint:
Here while loop will run n number of times as value of a is continuously increasing. If its 32 bit compiler then int will take 32 bits, and the value of a which starts from 0 will reach 2,147,483,647, and then it starts with negative value -2,147,483,648. At some point the value of a will be 0; and it will cause while loop to terminate.

Hint:
while loop is evaluated as while(0) which means while loop will be executed 0 times and since printf() is also part of it so nothing is printed here.

Hint:
Here while loop is evaluated as while(0) which means it will be executed 0 times and since printf is also part of it so nothing would be printed. Note:- if there are no { } braces after any loop then only the next statement is considered as a part of the loop.

Hint:
Here while loop is executed for a = 0 to a = 4 which is 5 times execuation hence CppBuzz.com is printed 5 times.