C Programming - Control Instructions - Discussion

@Akash is right, because this might be the case when we need to use a loop under if else statement, but we can't use looping with conditional operator. Only that is why first option is not correct.

Can we multiple else statements?

If so which else statement will be executed in case failure of if statement?

Here all options are correct, we can replace if else by conditional operator like:

if(a>b)
printf("hello");
else
printf("India");

Same can be implemented a>b? printf("hello") : printf("India").

Rest all options can be also implemented. So all are correct.

Guys 1st option is wrong because we can not use any loop in that operator but we can use any looping statements in if else.

#include<stdio.h>
int main()
{
int i,a=5;
if(a==5)
{
a==5?for(i=0;i<5;i++){printf("namastey\n");}:printf("error");

}
}

This code will give an error "expression syntax ".

@Gautam && @Madhu:

Yes gautam you are absolutely right I tried this code and it works, here the code is:

#include<stdio.h>
int main()
{
int x=10;
/*if(x>5)
{
printf("this is integer number:\n");
printf("this number is greater than 5\n");
printf("\n");
}
else if(x==5)
{
printf("this is an integer number:\n");
printf("the number is equal to 5:\n");
printf("\n");
}
else
{
printf("number is smaller than 5\n");
printf("\n");
}*/
x>5?(printf("this is integer number:\n"),printf("this number is greater then5\n")):(x==5?(printf("this is an integer number:\n"),
printf("the number is equl to 5:\n")):printf("number is smaller than 5\n"));
return(0);
}
Output:
This is integer number:
This number is greater than 5.

//So again we are at the same place where we started anyone please explain it very clearly.

#include<stdio.h>
int main()
{
int a = 10, b,c;
a >=5 ? (b=100,c=12): (b=200,c=15);
printf("%d %d\n", b,c);
return 0;
}

We may write multiple statements in this way in ?: operator. Then why option 1 is wrong? Please explain.

@Madhu.

You are right for this case but many case like (return X) in if condition so ?: is not allowed if condition only.

Friends here only only if - else can be replaced by ternary operator but not more than one it is wrong so there he specified more than one if-else.

Finally we can find only one solution using conditional statement that is to be assigned to its L-value, not more than one result as using if-else,

Ex. if(i==2)
{a=100; b=400; c=300;}
else
{a=0;b=0;c=1}

You can't write any conditional statement.

In first option there sholud be a small mistake i.e if else statement we can insert many statements under if and else using {}.

Where as in ?: operation we can insert only one statement after ? and also :

Sample Program:

#include<stdio.h>
int main()
{
int x=10;
if(x>5)
{
printf("this is integer number:");
printf("this number is greater then5");
printf("\n");
}
else if(x==5)
{
printf("this is an integer number:");
printf("the number is equl to 5:");
printf("\n");
}
else
{
printf("number is smaller than 5");
printf("\n");
}
return(0);
}

But in ?: operation we can use only one statement after the ? and :
shown below rather than using many statements in if else statements.....

(x>5)?(printf(x is gtreater than 5")):((x==5)?printf("the number is equal to 5"):printf("the number is smaller than 5:");