PATTERN-11 C-PROGRAMS

Write a program to display following pattern

1
AB
123
ABCD
12345

#include<stdio.h>
#include<conio.h>
int main()
{
int i,j,k;
for(i=1;i<=5;i++)
{
k=65;
if(i%2==0)
{
for(j=1;j<=i;j++)
{
printf("%c",k);
k++;
}
}
else
{
for(j=1;j<=i;j++)
{
printf("%d",j);
}
}
printf("\n");
}
}