Programs to print triangles using *, numbers and characters
Example 1: Program to print half pyramid using *
*
* *
* * *
* * * *
* * * * *
Source Code
rows = int(input("Enter number of rows: "))
for i in range(rows):
for j in range(i+1):
print("* ", end="")
print("\n")
Example 2: Program to print half pyramid a using numbers
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
Source Code
rows = int(input("Enter number of rows: "))
for i in range(rows):
for j in range(i+1):
print(j+1, end=" ")
print("\n")
Example 3: Program to print half pyramid using alphabets
A
B B
C C C
D D D D
E E E E E
Source Code
rows = int(input("Enter number of rows: "))
ascii_value = 65
for i in range(rows):
for j in range(i+1):
alphabet = chr(ascii_value)
print(alphabet, end=" ")
ascii_value += 1
print("\n")
Programs to print inverted half pyramid using * and numbers
Example 4: Inverted half pyramid using *
* * * * *
* * * *
* * *
* *
*
Source Code
rows = int(input("Enter number of rows: "))
for i in range(rows, 0, -1):
for j in range(0, i):
print("* ", end=" ")
print("\n")
Example 5: Inverted half pyramid using numbers
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
Source Code
rows = int(input("Enter number of rows: "))
for i in range(rows, 0, -1):
for j in range(1, i+1):
print(j, end=" ")
print("\n")
Programs to print full pyramids
Example 6: Program to print full pyramid using *
*
* * *
* * * * *
* * * * * * *
* * * * * * * * *
Source Code
rows = int(input("Enter number of rows: "))
k = 0
for i in range(1, rows+1):
for space in range(1, (rows-i)+1):
print(end=" ")
while k!=(2*i-1):
print("* ", end="")
k += 1
k = 0
print()
Example 7: Full Pyramid of Numbers
1
2 3 2
3 4 5 4 3
4 5 6 7 6 5 4
5 6 7 8 9 8 7 6 5
Source Code
rows = int(input("Enter number of rows: "))
k = 0
count=0
count1=0
for i in range(1, rows+1):
for space in range(1, (rows-i)+1):
print(" ", end="")
count+=1
while k!=((2*i)-1):
if count<=rows-1:
print(i+k, end=" ")
count+=1
else:
count1+=1
print(i+k-(2*count1), end=" ")
k += 1
count1 = count = k = 0
print()
Example 8: Inverted full pyramid of *
* * * * * * * * *
* * * * * * *
* * * * *
* * *
*
Source Code
rows = int(input("Enter number of rows: "))
for i in range(rows, 1, -1):
for space in range(0, rows-i):
print(" ", end="")
for j in range(i, 2*i-1):
print("* ", end="")
for j in range(1, i-1):
print("* ", end="")
print()
Example 9: Pascal's Triangle
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
Source Code
rows = int(input("Enter number of rows: "))
coef = 1
for i in range(1, rows+1):
for space in range(1, rows-i+1):
print(" ",end="")
for j in range(0, i):
if j==0 or i==0:
coef = 1
else:
coef = coef * (i - j)//j
print(coef, end = " ")
print()
Example 10: Floyd's Triangle
1
2 3
4 5 6
7 8 9 10
Source Code
rows = int(input("Enter number of rows: "))
number = 1
for i in range(1, rows+1):
for j in range(1, i+1):
print(number, end=" ")
number += 1
print()
