1.
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j;
for(i=1; i<=4; i++)
{
for(j=1; j<=i-1; j++)
{
printf(" ");
}
for(j=i+1; j<=9-i; j++)
{
printf("%d",j);
}
printf("\n");
}
getch();
}
Output
2345678
34567
456
5
////////////////////////////////////////
2.
enter numbers = 5
1
A B
2 3 4
C D E F
5 6 7 8 9
#include<stdio.h>
int main()
{
int i,j,k=65,n,p=1;
printf("enter numbers = ");
scanf("%d",&n);
for(i=1; i<=n; i++)
{
for(j=1; j<=i; j++)
{
if(i%2==0)
printf(" %c",k++);
else
printf(" %d",p++);
}
printf("\n");
}
return 0;
}
////////////////////////////////////////
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