format function in python

•  The format() function is used to format a specific value and insert that value in string placeholders.
•  The placeholders are cost{20}, number index{1},empty{}
• The place holder is defined by" curly braces"{}.
• The format function consists of parameters called value.
• It returns the formatted string.

Syntax:  str.format(values)

• Inside the placeholders, we can add different formatting types
• :+    indicates positive values.
• : -    indicates negative values.
• :      indicates the space before positive and also negative numbers.
• :_    indicates as a thousand separator.
• :,     uses as comma thousand separator.
• :=    left most position.
• :<    result in left alignment.
• :>    result in right alignment.
• :^     result in the center.
• :%    percentage format.
• :b     Binary format.
• :c     Unicode format.
• :d     Decimal format.
• :e      format with lower case.
• :E     format with upper case.
• :f      format with fixpoint number.
• :o    format is octal.
• :x      format is Hexa.
• :X     format is Hexa in uppercase.
• :n      number format.

#write a python code to demonstrate format function.

1. s0="my name is {fname},I m {age}".format("fname=abc",age=19)
2. s1="my name is{0},I m {1}".format("abc",19)
3. s2="my name is {},I m {}".format("abc",19)
4. print(s0)
5. print(s1)
6. print(s2)

Output:    my name is abc, I m 19.

                 my name is abc, I m 19.

                 my name is abc, I m 19.