Program to create number pyramid.

/*to make number pyramid*/

#include<stdio.h>
#include<math.h>

main()
{
   int num,t=0,s=1,j=0;
   int choice,num1,dig,sum=0;
   int n,i,pro;
 
   printf("1. FOR MAKE PYRAMID\n");
   printf("2. FOR FIND DIGITS SUM\n");
   printf("3. FOR MAKE MATHEMATICAL TABLE OF GIVEN NUMBER\n4. EXIT\n\n");
   
   do{
    
   printf("\nENTER YOUR CHOICE\n\n");
   scanf("%d",&choice);
   
   switch(choice)
  {
   case 1 : printf("enter the terms of pyramid\n");
            scanf("%d",&num);

            for(t=0;t<=num;t++)
            {
             for(j=0;j<=num-t;j++)
              {
                printf("  ");
              }
             for(s=1;s<=t;s++)
              {
                printf("   %d",s);
    
              }
             printf("   \n");     
            }
             printf("  ");
            break;
    case 2 : printf("enter the number\n");
             scanf("%d",&num1);
              
             while(num1!=0)
             {
               dig=num1%10;
               sum=sum+dig;
               num1=num1/10;
             }   
             printf("sum of indivisual digits=%d\n",sum);
             break;
    case 3 : printf("enter the number to make mathematical table\n");
             scanf("%d",&n);
             
             printf("table of number is \n\n");
            
             for(i=1;i<=10;i++)
            {
              pro=n*i;

              printf("%d\n",pro);
            }
            break;
            
    case 4 : break;
         
    default : printf("invalid option\ntry again\n");
             break;   
   }
  }while(choice!=4);
}