Answer Posted / arka bandyopadhyay

#include<stdio.h>
#include<conio.h>
void main()
{
int arr[5][5],i,j;
clrscr();
printf("\n");
//upper triangle matrix
for(i=0;i<5;i++)
{
for(j=0;j<5;j++)
{
arr[i][j]=(i+j);
}
}
for(i=0;i<5;i++)
{
for(j=0;j<5;j++)
{
if(j<4-i)
{printf(" ");
}
else printf("%d",arr[i][j]);
}
printf("\n");
}
printf("\n");
//lower triangle matrix
for(i=0;i<5;i++)
{
for(j=0;j<5;j++)
{
if(j>=4-i)
{printf(" ");
}
else printf("%d",arr[i][j]);
}
printf("\n");
}

getch();
}

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