Hi iman,

I tried to make triangle as you want , but due to less time i have only created it for increment part. Check code and output below.

#include <stdio.h>
#include <conio.h>

void main(){
    int i,j,num,c=1,d=2,n=1;
    clrscr();
    printf("*****FLOYD'S TRIANGLE*****\n\n");
    printf("Enter number upto which u want to generate : ");
    scanf("%d",&num);
    for(i=c;i<=num;){
	c=1;
	d=2;
	for(j=1;j<=i;j++){
	   if(n == 1)
	   {
	    printf("%5d ",c);
	    c = c+2;
	   }
	   if(n == 0)
	   {
	   printf("%5d ",d);
	   d = d + 2;
	   }
	   if(c > num || d > num)
	   {
	      goto out;
	   }
	}
	printf("\n");
	if(n == 1)
	n = 0;
	else
	n = 1;
	if(n == 1)
	i++;
    }
    out:
getch();
}

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2 4 6