#23 Python Tutorial for Beginners | Printing Patterns in Python

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In this lecture we will learn:
- How to implement the logic for pattern printing?
- Pattern printing through python
- Print the pattern of a square
- Print the pattern of the right triangle and reverse right-triangle
- Different approaches to printing a pattern

#1
- Pattern printing improves logical thinking capability.
- Programming is all about solving the problem, we have to understand the problem statement and wrote code for it.
- A pattern can be printed in many ways.
- We can print multiple hashes(#) in a single statement as a string.
- If you are allowed to print only hash in a statement at a time, then you have to write the same print statement multiple times.
- On writing a statement multiple times, it will give an output in a column.
- To convert a column output into a row format, we can use the end=" "parameter in every statement.
- To will restrict the cursor to move on a new line and hashes(#) will be printed in a single row.

#2
- Instead of writing the same code multiple times, we can use a for a loop.
- For a range(n) in a for loop, it will start from 0 and end at (n-1).
- We can use two loops, for printing two rows separated by a new line.
- For printing multiple rows, we have to write the same for loop code repeatedly.
- So, we can write the above for loop block inside another outer loop.
- In nested loops, an outer loop contains a variable that represents the number of rows and an inner loop contains a variable that represents the number of columns.

#3
- We can apply the concept to different patterns in a similar way.
e.g., for printing a right -triangle, we can restrict the inner loop till the value of a number of rows.
- For the reverse of the right triangle, we can restrict the inner loop till (n-i), where i is the number of rows.

Python Tutorial to learn Python programming with examples

In this video we will see:
- Printing patterns
- Using loop
- For loop

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[AmarjeetKumar-doiz]

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[vijaychaurasiya]

str1='ABCD'
str2='PQR'
for i in range(4):
print(str1[ : i+1 ] + str2[ i : ])

[panakitikos]

that man needs much more recognition, seriously i learned from this guy in a couple of months what i learned from college in one academic year, not just in python, but his other topics and his logic

[nikhilpn]

1.for i in range(1, 5):
2. for j in range(i, 5):
3. print( j, end=" ")
4. print()

[rizwanshaikh]

Awesome...
Better than paid courses...

[ashokreddy]

Answers for 1st and 2nd:
for i in range(5):
for a in range(4-i):
print(a+1+i, end='')
print()
😑2nd one:
a, b="ABCD", "PQR"
for i in range(4):
print(a[:i+1]+b[i:])
Thank you SIR 😊

[AnkushMalode]

1)

for i in range(4):
for j in range(4-i):
print (i+j+1, end=' ')

print()

[sarthakagrawal]

1).
for i in range(4):
for j in range(i+1, 5):
print(j, end="")
print()
2).
s1="ABCD"
s2="PQR"
for i in range(4):
print(s1[0:i+1]+s2[i:])

[ranjeet_]

#Solution for 2nd problem
for i in range(4):
for j in range(4):
if(i<j):
print(chr(65+14+j), end=" ")
else :
print(chr(65+j), end=" ")
print()

[DarkKnight-dcgr]

1)
for i in range(1, 6):
for j in range(i, 5):
print(j, end="")
print()
2)
s1="ABCD"
s2="PQR"
l=len(s1)
for i in range(0, 4):
for j in range(i+1):
print(s1[j], end="")
for k in range(i, 3):
print(s2[k], end="")
print()

[nishantchandraazad]

Great Teacher I got in YouTube, the best part you have mention "we don't teach we educate" it is actual true, I really enjoy your videos, Thanks for teaching

[brodycates]

I've watched a 6 hour course and used sololearn and this was never properly explained. You explained perfectly. I commend you

[thilinasenadheera]

Dear Sir. This is a very valuable series. I got the same result with below code.
for i in range(4, 0, -1): # starting each row from the heighest size
for j in range(i): # Printing each column inside each row according to row size
print("#", end="")
print() # Printing a new line to start a new row
Please do more stuff like this. Respect from a

[mrjh]

The reason for learning this explained in 45 seconds. This is hat I have found gold with Navin's videos, in addition the the solid walk through.

[ritiksingh]

Trust me it's much better than any paid course's . Truely appreciable work. Thanks sir for giving such type of knowledge 🙂

[adriaanmeij]

For the reverse I used range and gotten the same result which is pretty cool. Code:
for i in range(5, 0, -1):
for j in range(i):
print("# ", end="")
print()

[PiyushSharma-hyej]

1st pattern:==>
for i in range(1, 5):
for j in range(1, 5):
k=i+j-1
if k>4:
print("", end="")
else:
print(k, end="")
print()
2nd pattern:==>
x='ABCD'
y='PQR'
for i in range(1, 5):
print(x[:i]+y[i-1:])

[prathikkundaragi]

I'm a beginner.I liked the way he teaches. Started watching his videos in the morning 11 a.m and now reached 21st video by this time on the very same day. wonderful job sir.Nobody can teach the way he teaches.

[anusreeanoop]

#1
For i in range (1, 5):
For j in range (i, 5):
Print(j, end="")
Print()

#2
a="ABCD"
b="PQR"
for i in range (4):
For j in range (3):
Print(a[0:i+1], end="")
Print(b[i:j+3], end="")
Break
Print()

[amyamy]

A ="ABCDPQR"
for i in range(4):
for j in range(7):
if j>i and j<i+4:
continue
else:
print(A[j], end =" ")
print()