Firstly we will take a for loop(outer) for no of rows.
Print spaces
For every ith row , print n-i spaces.
Print numbers
For every ith row print i numbers.Initialize no = 1.After printing a number,increment no.
#include<stdio.h>
int main()
{
int i,j,n,no=1;
printf("Enter number of rows ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(j=i;j<n;j++)
printf(" ");
for(j=1;j<=i;j++)
printf("%d ",no++);
printf("\n");
}
return 0;
}
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