i am going to share simple program in c language . i hope you learn it 


#include<stdio.h>
main()
{
	int a,b;
	for(a=1;a<=5;a++)
	{
		for(b=1;b<=a;b++)
		{
			printf("%d",b);
		}
		printf("\n");
	}
	return 0;
}

out put of this program is 
1
12
123
1234
12345

if we change ,i mean if we write a in printf statement out will be diffrent.

#include<stdio.h>
main()
{
	int a,b;
	for(a=1;a<=5;a++)
	{
		for(b=1;b<=a;b++)
		{
			printf("%d",a);
		}
		printf("\n");
	}
	return 0;
}
out is :
1
22
333
4444
55555

i hope you learn it .
thanks for watching stay tuned: