PPS UNIT -04 STRINGS
Q.1 what is string. How we concatenate two strings.
1. Python string data type is a sequence of characters.
2. Characters could be a letter, digit, whitespace or any other symbol.
3. Python treats strings as contiguous series of characters delimited/enclosed by single, double or triple quotes.
4. Python has built in string class str
5. We can declare and define a string by creating a variable of string type.
6. str() is used to convert values of any other type into string type.
7. Example-
name=“India”
country=name
division=str(“FE-G”)
Q.2 Explain String indexing and string Traversing with Give Example.
String Indexing and String Traversing-
String Indexing-
1. Individual characters in a string are accessed using the subscript ([]) operator.
2. The expression in bracket called index
3. Index specifies the character we want to access from given set of characters in a string.
4. Index of first character is 0 and index of last character is n-1. nis number of character in string.
5. Every symbol in string having its own index.
String Traversing-
A string can be traversed by accessing characters from one index to another.
Q.3 write a note on string format operator.
String Format Operator %
1. The format operator, % allows users to construct strings, replacing parts of the strings with data stored in variables.
2. The % operator takes a format string on left (%d, %s) and the corresponding values in tuple on the right.
3. Multiple values added in parenthesis and separated by comma.
, Following are the format sequence-
i. %s - String (or any object with a string representation, like numbers)
ii. %c- single character
iii. %d or %i – Integers
iv. %u- unsigned decimal integer
v. %f - Floating point numbers
vi. %.<number of digits>f - Floating point numbers with a fixed amount of digits to the right of the dot.
vii. %o- Octal integer
viii. %x - Integers in hex representation
Syntax and Example of String Formating operator %
“<format>” %(<values>)
Format consist of sequence of character and conversion specification.
Conversion specification start with a % operator and can appear anywhere within a string.
Example- Program to use format sequence while printing a string
name=“abcd”
rollno=35
print(“name is %s and rollno is %d” %( name, rollno))
output- name is abcd and rollno is 35
Q.4 Explain use of format() method with help of example.
Format() method and { } placeholder
1. The format function used with strings is very powerful function used for formatting string.
2. Format string have curly braces { } as placeholder which get replaced.
3. We can use positional argument or keyword arguments to specify the order of fields which have to be replace.
4. Example-
a="welcome“
b="python“
print("{ } to learning { }".format( a, b))
print("{b} for learning {a}".format(b = "easy", a = "language“ ))
OUTPUT-
welcome to learning python
easy for learning language
Q.5 What is slice operation? Explain with example.
Q.1 what is string. How we concatenate two strings.
1. Python string data type is a sequence of characters.
2. Characters could be a letter, digit, whitespace or any other symbol.
3. Python treats strings as contiguous series of characters delimited/enclosed by single, double or triple quotes.
4. Python has built in string class str
5. We can declare and define a string by creating a variable of string type.
6. str() is used to convert values of any other type into string type.
7. Example-
name=“India”
country=name
division=str(“FE-G”)
Q.2 Explain String indexing and string Traversing with Give Example.
String Indexing and String Traversing-
String Indexing-
1. Individual characters in a string are accessed using the subscript ([]) operator.
2. The expression in bracket called index
3. Index specifies the character we want to access from given set of characters in a string.
4. Index of first character is 0 and index of last character is n-1. nis number of character in string.
5. Every symbol in string having its own index.
String Traversing-
A string can be traversed by accessing characters from one index to another.
Q.3 write a note on string format operator.
String Format Operator %
1. The format operator, % allows users to construct strings, replacing parts of the strings with data stored in variables.
2. The % operator takes a format string on left (%d, %s) and the corresponding values in tuple on the right.
3. Multiple values added in parenthesis and separated by comma.
, Following are the format sequence-
i. %s - String (or any object with a string representation, like numbers)
ii. %c- single character
iii. %d or %i – Integers
iv. %u- unsigned decimal integer
v. %f - Floating point numbers
vi. %.<number of digits>f - Floating point numbers with a fixed amount of digits to the right of the dot.
vii. %o- Octal integer
viii. %x - Integers in hex representation
Syntax and Example of String Formating operator %
“<format>” %(<values>)
Format consist of sequence of character and conversion specification.
Conversion specification start with a % operator and can appear anywhere within a string.
Example- Program to use format sequence while printing a string
name=“abcd”
rollno=35
print(“name is %s and rollno is %d” %( name, rollno))
output- name is abcd and rollno is 35
Q.4 Explain use of format() method with help of example.
Format() method and { } placeholder
1. The format function used with strings is very powerful function used for formatting string.
2. Format string have curly braces { } as placeholder which get replaced.
3. We can use positional argument or keyword arguments to specify the order of fields which have to be replace.
4. Example-
a="welcome“
b="python“
print("{ } to learning { }".format( a, b))
print("{b} for learning {a}".format(b = "easy", a = "language“ ))
OUTPUT-
welcome to learning python
easy for learning language
Q.5 What is slice operation? Explain with example.
