Functions

• Function is a collection of statements which is made to perform a specific task. 

• To Execute function, we have to call it in the program. 

• Instead of writing a large program we can write small functions as a specific part of program to accomplish the task. 

• Once written a function can also be used in other programs as library functions. 

• Functions can be categorized in three types 

  • Built In Functions

  • Functions in Modules

  • User Defined Functions

1. Type Conversion Function:

These are the functions which converts the values from one type to another:

• int() - converts string to integer

• str() - converts any value to string

• float() - converts string to float

2. Input Functions: 

This function is used to take input from user in the form of string. 

3. eval() function:

This function is used to evaluate the value of a string. 

4. min() function:

This function returns the smallest value among given list of values. 

5. max() function:

This function returns the biggest value among given list of values. 

6. abs() function:

This function returns the absolute value of any integer which is always positive. 

7. type() function:

This function is used to identify the type of any value or variable. 

8. len() function:

This function returns the length of given string. 

9. round() function:

This function returns the rounded number of given number up to given position. 

10. range() function:

If you want the series between two numbers then you can use this function. This is useful tool for loop. Its syntax is