Python

String Operations

Write python programs to understand Strings: Basic String Operations, String Methods and List.

# basic string operations

# 1. Concatenation
str = "Hello" + " " + "World"
print(str)

# 2. Repetition
str = "Hello" * 3
print(str)

# 3. Membership
str = "Hello World"
print("Hello" in str)
print("Hello" not in str)

# 4. Slicing
str = "Hello World"
print(str[0:5])
print(str[6:])
print(str[:5])
print(str[-5:-1])
print(str[0:5:2])

# 5. Length
str = "Hello World"
print(len(str))

# 6. Iteration
str = "Hello World"
for i in str:
    print(i)

# 7. Comparison
str1 = "Hello"
str2 = "Hello"
print(str1 == str2)
print(str1 != str2)
print(str1 > str2)
print(str1 < str2)

# 8. String Formatting
str = "Hello World"
print("String is: %s" % str)
print("String is: %10s" % str)
print("String is: %-10s" % str)

# 9. Escape Sequence
print("Hello \"World\"")
print("Hello \'World\'")
print("Hello \\World\\")

# 10. Raw String
print(r"Hello \n World")

# 11. Triple Quotes
print("""Hello
World""")

# 12. String as Sequence
str = "Hello World"
print(str[0])
print(str[1])

# 13. String as Array
str = "Hello World"
print(str[0])

# 14. String as Object
str = "Hello World"
print(str.upper())

# 15. String as Iterator
str = "Hello World"
it = iter(str)
print(next(it))

# 16. String as Argument
str = "Hello World"
print(str)

# 17. String as Return Value
def str():
    return "Hello World"

print(str())

# 18. String as Variable
str = "Hello World"
print(str)

# 19. String as Expression
str = "Hello World"
print(str)

# 20. String as Index
str = "Hello World"
print(str[0])