C program to print half pyramid or half right angled triangle :
In this C programming tutorial, we will learn how to print a half pyramid or half right angled triangle using a special character or any other character. In this tutorial, we will learn how to print a half right angled triangle :
-
With any special character
-
With incrementing digits from start to end.
-
With incrementing digits on each line starting from 1.
-
With different characters on each line.
With any special character :
The C program will look like below :
#include <stdio.h>
int main()
{
//1
int i, j, row;
char c;
//2
printf("Enter total number of rows for the pyramid : ");
scanf("%d", &row);
//3
printf("Enter the character to use : ");
scanf(" %c", &c);
//4
for (i = 1; i <= row; ++i)
{
//5
for (j = 1; j <= i; ++j)
{
printf("%c ", c);
}
printf("\n");
}
return 0;
}
Explanation :
The commented numbers in the above program denote the step numbers below :
-
Create three integers i,j and row. i and j will be used in loops and row are to store the total row count. Also, create one character c to store the character for printing the pyramid.
-
Ask the user to enter the total number of rows for the pyramid. Read it and store it in the row variable.
-
Ask the user to enter the character to use for printing the pyramid. Read it and store in the c variable.
-
Run one for loop. This loop will run for row amounts of time. If we are printing one pyramid with 4 rows, it will run for 4 times.
-
Run one inner for loop. This inner for loop is used to print the characters for each row. For the first row, we will print 1 character, for the second row, 2 characters etc. So, this loop will run for the same as the value of i. Inside this loop, print the character.
Sample Output :
Enter total number of rows for the pyramid : 5
Enter the character to use : *
*
* *
* * *
* * * *
* * * * *
Enter total number of rows for the pyramid : 8
Enter the character to use : @
@
@ @
@ @ @
@ @ @ @
@ @ @ @ @
@ @ @ @ @ @
@ @ @ @ @ @ @
@ @ @ @ @ @ @ @
With incrementing digits from start to end :
#include <stdio.h>
int main()
{
int i, j, row;
int flag = 1;
printf("Enter total number of rows for the pyramid : ");
scanf("%d", &row);
for (i = 1; i <= row; ++i)
{
for (j = 1; j <= i; ++j)
{
printf("%d ", flag);
flag++;
}
printf("\n");
}
return 0;
}
Sample Output :
Enter total number of rows for the pyramid : 5
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
Enter total number of rows for the pyramid : 8
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31 32 33 34 35 36
Enter total number of rows for the pyramid : 2
1
2 3
With incrementing digits on each line :
#include <stdio.h>
int main()
{
int i, j, row;
int flag;
printf("Enter total number of rows for the pyramid : ");
scanf("%d", &row);
for (i = 1; i <= row; ++i)
{
flag = 1;
for (j = 1; j <= i; ++j)
{
printf("%d ", flag);
flag++;
}
printf("\n");
}
return 0;
}
Sample Output :
Enter total number of rows for the pyramid : 5
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
Enter total number of rows for the pyramid : 7
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7
Enter total number of rows for the pyramid : 3
1
1 2
1 2 3
With different character on each line :
#include <stdio.h>
int main()
{
int i, j, row;
char c = 'a';
printf("Enter total number of rows for the pyramid : ");
scanf("%d", &row);
for (i = 1; i <= row; ++i)
{
for (j = 1; j <= i; ++j)
{
printf("%c ", c);
}
c++;
printf("\n");
}
return 0;
}
Sample Output :
Enter total number of rows for the pyramid : 5
a
b b
c c c
d d d d
e e e e e
Enter total number of rows for the pyramid : 7
a
b b
c c c
d d d d
e e e e e
f f f f f f
g g g g g g g
Enter total number of rows for the pyramid : 3
a
b b
c c c
