Number Pattern : 20

Program:

 #include<stdio.h>
int main()
{
int i,j,k,n;
printf("How many lines: ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
for(k=1;k<i;k++)
{
printf(" ");
}
for(j=1;j<=n-i+1;j++)
{
printf("%d",i);
}
printf("\n");
  }
return 0;
}

Output:

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