What will be the output of the following code?1234567891011121314151617#include <stdio.h>int main() { int i = 0, product = 10;start: if (i < 4) { product *= (i + 1); i++; if (i != 2) goto start; } printf("%d", product); return 0;}
Question
What will be the output of the following code?1234567891011121314151617#include <stdio.h>int main() { int i = 0, product = 10;start: if (i < 4) { product *= (i + 1); i++; if (i != 2) goto start; } printf("%d", product); return 0;}
Solution
The output of the code will be 20.
Here's the step-by-step explanation:
-
The program starts with the initialization of two integer variables,
iandproduct, with values 0 and 10 respectively. -
Then it enters a labeled section of code called
start. -
Inside
start, there's anifcondition that checks ifiis less than 4. Sinceiis initially 0, the condition is true and the program enters theifblock. -
Inside the
ifblock,productis multiplied byi + 1(which is 1 at the start), soproductbecomes 10. -
Then
iis incremented by 1, soibecomes 1. -
The next
ifcondition checks ifiis not equal to 2. Sinceiis 1, the condition is true and the program jumps back tostart. -
The process repeats. This time
productis multiplied byi + 1(which is 2 now), soproductbecomes 20. -
iis incremented again and becomes 2. -
The next
ifcondition checks ifiis not equal to 2. This timeiis 2, so the condition is false and the program doesn't jump back tostart. -
The program then prints the value of
product, which is 20, and returns 0 to end the program.
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