I wanted to first increase a no. From 1 to 5 and then decrease it to 1 again using the same loop,but it isn't working.Pleasehelp

Question

#include <stdio.h>

void main()
{
int i,j,k;

for(i=1;i<6;i++)
{
for(j=0;j<6-i;j++)
{
printf(" ");
}
j=1;
do
{
printf(" %d",j);

if(j<i)
{j++;
}

if(j>i)
{j--;
}
}
while(j!=1);
printf("\n");
}

}

I am trying to make

1
121
12321
1234321
123454321

Answer 1

https://code.sololearn.com/c9176coVPDsg/?ref=app
check my one

Answer 2

https://code.sololearn.com/cuyQ14jbw5pM/?ref=app
check my code

Answer 3

https://code.sololearn.com/cbiO5vglj3J8/?ref=app