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GATE | GATE CS 2021 | Set 1 | Question 47
  • Last Updated : 24 May, 2021

Consider the following ANSI C program.

#include 
int main()
{
    int i, j, count;
    count=0;
    i=0;
    for (j=-3; j<=3; j++)
    {
        if (( j >= 0) && (i++))
        count = count + j;
    }
    count = count +i;
    printf(ā€œ%dā€, count);
    return 0;
}

Which one of the following options is correct?
(A) The program will not compile successfully
(B) The program will compile successfully and output 10 when executed
(C) The program will compile successfully and output 8 when executed
(D) The program will compile successfully and output 13 when executed


Answer: (B)

Explanation: Initially, i=0, count=0 and a for loop is running from j= -3 to j=3.
If condition inside the for loop will execute when j>=0 and i is non zero,
So for j=-3, -2, -1, it will not go inside the if condition, as j is less than 0.

When j=0, initial value of i is also 0, so if condition will not satisfy, but i++ will increment the value of i after checking the if condition. so now i =1.
When j=1, the value of i is 1, so it will enter the if condition and the value of count will be 0+1 = 1, and i++ will increment the value of i after checking the if condition. so now i =2.
When j=2, the value of i is 2, so it will enter the if condition and the value of count will be 1+2 = 3, and i++ will increment the value of i after checking the if condition. so now i =3.
When j=3, the value of i is 3, so it will enter the if condition and the value of count will be 3+3 =6 , and i++ will increment the value of i after checking the if condition. so now i =4.

After running the for loop, the value of count variable is 6 and the value of i is 4.
So count= count +i will be 6+4=10.

Hence, The program will compile successfully and output 10 when executed : https://ide.geeksforgeeks.org/lyJ79mDqil

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