C Programming - Control Instructions - Discussion
Discussion Forum : Control Instructions - Find Output of Program (Q.No. 3)
3.
What will be the output of the program?
#include<stdio.h>
int main()
{
int a = 500, b = 100, c;
if(!a >= 400)
b = 300;
c = 200;
printf("b = %d c = %d\n", b, c);
return 0;
}
Answer: Option
Explanation:
Initially variables a = 500, b = 100 and c is not assigned.
Step 1: if(!a >= 400)
Step 2: if(!500 >= 400)
Step 3: if(0 >= 400)
Step 4: if(FALSE) Hence the if condition is failed.
Step 5: So, variable c is assigned to a value '200'.
Step 6: printf("b = %d c = %d\n", b, c); It prints value of b and c.
Hence the output is "b = 100 c = 200"
Discussion:
33 comments Page 2 of 4.
Mahalakshmi said:
10 years ago
How !500=0? Please explain.
Jinal said:
1 decade ago
Not understand what meaning if (!a>=400) please explain it.
Denny said:
1 decade ago
What is meant by 500?
Ratna said:
1 decade ago
When there is no body part, loop ended at the immediate semicolon.
Bhaskar said:
1 decade ago
What is the difference between !(a<=40) and (!a<=40)?
X-hedow said:
1 decade ago
! means not equal to which in the case is 500.
Then I think we should start considering 'b' and 'c'.
Therefore 'b' is true.
But as for 'c' I do not understand where it's value came from.
Then I think we should start considering 'b' and 'c'.
Therefore 'b' is true.
But as for 'c' I do not understand where it's value came from.
Mayank bhardwaj said:
1 decade ago
Yes because when we don't uses braces then if statement take only first statement.
Meet123 said:
1 decade ago
Actually if statement execute the statement which immediately follows it conditional statement.
So in this case b=300. Which will be either executed or not executed whether condition is true or false. So condition is false and immediate condition is not executed.
So in this case b=300. Which will be either executed or not executed whether condition is true or false. So condition is false and immediate condition is not executed.
Soumya said:
1 decade ago
I am having a doubt with how C is getting the value of 200 even if the condition is false and we don't know the position of C whether it is outside the loop or not.
Ayyappa said:
1 decade ago
'b' takes up the initial value i.e. 100 since the condition (!a>=400) fails. You take that condition to be (a<400) but the value of a is 500 so the condition is false and then 'c' is placed out of the if loop so it takes up 200.
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