Day 6 - For loop & If condition

for loop:

A for loop in Python is used to iterate over a sequence and perform a block of code for each element in that sequence.

Stntax:

for variable in sequence:

Example:

txt = '1234'

for num in txt:
    print(num,end=' ')

Output:

1 2 3 4

if condition:

The if condition is a fundamental control structure in programming, used to make decisions based on whether a given condition is true or false.

Syntax:

if condition:
    # execute if condition is True
else:
    # execute if condition is False

Example:

x = 10
if x > 5:
    print("x is greater than 5")
else:
    print("x is 5 or less")

Output:

x is greater than 5

Example for forloop and if condition:

txt = '12a4'

for num in txt:
    if num>='0' and num<='9':
        print(num,end=' ')
    else:
        print('Not Decimal',end=' ')

Output:

1 2 Not Decimal 4

The code checks each character in the string txt to determine if it represents a digit. If the character is between '0' and '9', it is printed; otherwise, it prints 'Not Decimal'

name = input("Your Name please: ")
print(name)
for alphabet in name:
    print(alphabet, end='*')

Your Name please: pritha
pritha
p*r*i*t*h*a*

Excercise:

name1 = input("Enter the first name: ")
name2 = input("Enter the second name: ")
name3 = input("Enter the third name: ")
name4 = input("Enter the fourth name: ")
name = [name1, name2, name3, name4]

# Check if names start with 'G'
for letter in name:
    if letter[0]=='G':
        print(letter)
    else:
        continue
# Check if names end with 'a'
for alphabet in name:
    if alphabet[-1]=='a':
        print(alphabet)
    else:
        continue
# Check if names contain a space
for alpha in name:
    for i in alpha:
        if i==' ':
            print(alpha)
        else:
            continue
# Check if names are longer than 9 characters
for character in name:
    if len(character)>9:
        print(character)
    else:
        continue

1.if letter[0] == 'G': checks if the first character of the name is 'G'.
2.if alphabet[-1] == 'a': checks if the last character of the name is 'a'.
3.if i == ' ': prints the name if a space is found, then exits the inner loop with break.
4.if len(character) > 9: checks if the length of the name exceeds 9.

Enter the first name:Lakshmi Pritha
Enter the second name:Guru Prasanna
Enter the third name:Guhanraja
Enter the fourth name:Varatharajan
Guru Prasanna
Guhanraja
Lakshmi Pritha
Guru Prasanna
Guhanraja
Lakshmi Pritha
Guru Prasanna
Lakshmi Pritha
Guru Prasanna
Varatharajan