In this article, we will discuss the concept of C code to Alphabet triangle pattern using the do-while loop in C programming language
We can print various type of number, asterisk, binary patterns using for, while and do-while loop in C language
In this post, we will discuss how to write a program to print different alphabet triangle pattern using the do-while loop in C language.
To understand this example programs, you should have previous knowledge of following Java topics
Nested do while loop in C language
Program 1
#include <stdio.h>
#include <stdlib.h>
int main()
{
int rows;
printf("Alphabet pattern\n");
printf("Enter the number of rows\n");
//Takes input from the user to number of rows
scanf("%d",&rows);
printf("\n");
int i,j;
i=1;
do{//outer loop
j=1;
do{//inner loop
printf("%c",'A'-1+i);
j++;
}while(j<=i);
printf("\n");
i++;
}while(i<=rows);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 2
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,rows;
printf("Enter the number of rows: ");
//Takes input from the user to number of rows
scanf("%d",&rows);
printf("\n");
i=rows;
do{//outer loop
j=i;
do
{//inner loop
printf("%c",'A'-1+j);
j--;
}while(j>=1);
i--;
printf("\n");
}while(i>=1);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 3
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,rows;
printf("Alphabet pattern\n\n");
printf("Enter the number of rows\n");
//Takes input from the user to number of rows
scanf("%d",&rows);
i=1;
do{
j=rows;
do{
printf("%c",'A'-1+i);
j--;
}while(j>=i);
printf("\n");
i++;
}while(i<=rows);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 4
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,rows;
printf("Alphabet pattern \n\n");
printf("Enter number of rows\n");
//Takes input from the user to number of rows
scanf("%d",&rows);
printf("\n");
i=1;
do{
j=1;
do{
printf("%c",'A'+j-1);
j++;
}while(j<=i);
printf("\n");
i++;
}while(i<=rows);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 5
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,rows;
printf("Alphabet pattern 1\n\n");
printf("Enter the number of rows\n\n");
//Takes input from the user to number of rows
scanf("%d",&rows);
printf("\n");
i=rows;
do{
j=i;
do{
printf("%c",'A'+j-1);
j++;
}while( j<=rows);
printf("\n");
i--;
}while( i>=1);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 6
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Alphabet pattern \n\n");
printf("Enter the number of rows \n\n");
//Takes input from the user for number of rows
int i,j,rows;
scanf("%d",&rows);
i=rows;
do{
j=1;
do{
printf("%c",'A'+j-1);
j++;
}while( j<=i);
printf("\n");
i--;
}while( i>=1);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 7
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,rows;
printf("Enter the number of rows\n");
//Takes input from the user for number of rows
scanf("%d",&rows);
printf("your pattern here\n");
i=1;
do{
j=i;
do{
printf("%c",(char)(j+64));
j++;
}while(j<=rows);
i++;
printf("\n");
}while(i<=rows);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 8
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,rows;
char ch='A';
printf("Enter the number of rows: \n");
//Takes input from the user for number of rows
scanf("%d",&rows);
i=1;
do{
j=1;
do{
printf("%c ",ch++);
j++;
}while(j<=i);
printf("\n");
i++;
}while(i<=rows);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 9
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,rows,num,count;
printf("Enter the number of rows: \n");
//Takes input from the user for number of rows
scanf("%d",&rows);
i=1;
while(i<=rows){
num=rows-1;
count=i;
j=1;
do{
printf("%2c",(char)(count+64));
count=count+num;
num--;
j++;
} while( j<=i);
printf("\n");
i++;
}
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 10
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,k,rows;
printf("Enter the number of rows\n");
//Takes input from the user for number of rows
scanf("%d",&rows);
i=rows;
do{
k=i;
j=1;
do{
printf("%c",(char)(k+64));
j++;
k++;
}while(j<=i);
printf("\n");
i--;
}while(i>=1);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 11
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,k,rows;
printf("Enter the number of rows\n");
//Takes input from the user for number of rows
scanf("%d",&rows);
i=1;
do{
j=1;
do{
printf(" ");
j++;
}while(j<=rows-i+1);
k=1;
do{
printf("%c",(char)(k+64));
k++;
} while(k<=i);
printf("\n");
i++;
}while(i<=rows);
getch();
return 0;
}
When the above code is executed, it produces the following results
Program 12
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i,j,k,rows;
printf("Enter the number of rows\n");
//Takes input from the user for number of rows
scanf("%d",&rows);
i=1;
do{
j=1;
do{
printf(" ");
j++;
}while(j<=rows-i);
k=1;
do{
printf("%c",(char)(j+64));
k++;
}while(k<=i);
printf("\n");
i++;
} while(i<=rows);
getch();
return 0;
}
When the above code is executed, it produces the following results
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