2. Input and output your Roll no., marks, and percentage to an appropriate format.

#include<stdio.h>
int main()
{
	int roll_no,marks,percentage;
	scanf("%d\t%d\t%d",&roll_no,&marks,&percentage);
	printf("Roll No. is %d\n",roll_no);
	printf("Marks is %d\n",marks);
	printf("Percentage is %d\n",percentage);
	return 0;
}

1. Print on the Screen : “Hello” How are you?

#include<stdio.h>
int main()
{
	printf("Hello\n");
	printf("How are you?");
	return 0;
}