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//program to find lcm and hcf of 2 numbers using while loop #include<stdio.h> #include<conio.h> void main() { int a,b,c; printf("Enter number 1 :"); scanf("%d",&a); printf("Enter number 2 :"); scanf("%d",&b); c=a*b; while(a!=b) { if(a>b) a=a-b; else b=b-a; } printf("HCF \t= %d",a); printf("LCM \t= %d",c/a); getch(); }