#include<stdio.h> int main() { int i,j; char patt[]="HELLO"; for(i=1;i<=5;i++) { for(j=0;j<=i-1;j++) { printf("%c",patt[j]); } printf("\n"); } for(i=3;i>=0;i--) { for(j=0;j<=i;j++) { printf("%c" ,patt[j]); } printf("\n"); } }
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1) Write a program to calculate the perimeter of a rectangle. Take sides, a & b, from the user. Answer:- C Programming code - : CODE:- //Write a program to calculate the perimeter of a rectangle #include<stdio.h> int main() { int a, b, perimeter; printf("enter the side of rectangle a:\n",a); scanf("%d",&a); printf("enter the side of rectangle b:\n",b); scanf("%d",&b); perimeter=2*(a+b); printf("perimeter of rectangle is : %d",perimeter); return(0); } Input and output :-