Python Programs

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Python Programs - Conditional Statements

Check if a string starts with a specific letter - Python Program

Example 1 :

s = input("Enter a string: ")

if s.startswith("A") or s.startswith("a"):
    print("Starts with A")
else:
    print("Does not start with A")

 
OUTPUT 1 :
Enter a string: Apple
Starts with A 

OUTPUT 2 :
Enter a string: Orange
Does not start with A 

Python String startswith()

The startswith() method returns True if a string starts with the specified prefix(string). If not, it returns False.

Example 2 :

message = 'Python is fun'

# check if the message starts with Python
print(message.startswith('Python'))
 

 
OUTPUT :
True

Syntax of String startswith()

The syntax of startswith() is:

str.startswith(prefix[, start[, end]])

startswith() Parameters

startswith() method takes a maximum of three parameters:

• prefix- String or tuple of strings to be checked
• start(optional) - Beginning position where prefix is to be checked within the string.
• end(optional) - Ending position where prefix is to be checked within the string.

startswith() Return Value

startswith() method returns a boolean.

• It returns Trueif the string starts with the specified prefix.
• It returns Falseif the string doesn't start with the specified prefix.

Python String startswith()

The startswith() method returns True if a string starts with the specified prefix(string). If not, it returns False.

Example 3 : startswith() Without start and end Parameters

text = "Python is easy to learn."

result = text.startswith('is easy')
# returns False
print(result)

result = text.startswith('Python is ')
# returns True
print(result)

result = text.startswith('Python is easy to learn.')
# returns True
print(result)
 

 
OUTPUT :
False
True
True

Example 4 : startswith() With start and end Parameters

text = "Python programming is easy."

# start parameter: 7
# 'programming is easy.' string is searched
result = text.startswith('programming is', 7)
print(result)

# start: 7, end: 18
# 'programming' string is searched
result = text.startswith('programming is', 7, 18)
print(result)

result = text.startswith('program', 7, 18)
print(result)
 

 
OUTPUT :
True
False
True

Passing Tuple to startswith()

Example 5 : startswith() With Tuple Prefix

text = "programming is easy"
result = text.startswith(('python', 'programming'))

# prints True
print(result)

result = text.startswith(('is', 'easy', 'java'))

# prints False
print(result)

# With start and end parameter
# 'is easy' string is checked
result = text.startswith(('programming', 'easy'), 12, 19)

# prints False
print(result)
 

 
OUTPUT :
True
False
False