Python: Map VS For Loop
Map in Python :
- Map is used to compute a function for different values ‘in a single line of code ‘ .
- It takes two arguments, first is function name, that is defined already and the other is list, tuple or any other iterables .
- It is a way of applying same function for multiple numbers .
- It generates a map object at a particular location .
- It works fast when we call an already defined function on the elements
Note: For more information refer to Python map() function.
for loop in Python :
- We use for loop to repeat a block of code for fixed number of times .
- Used when no results are required .
- To perform sequential traversal .
- Loop from 0 to n runs n+1 times .
for var in iterable : statements
Note: Here, var is the name given to iterating variable, iterable can be replaced by range() function and they can be of any data type . Statements are the step of actions to be performed .
Note: For more information, refer to Python For Loops.
<map object at 0x7fe413cf9b00> [0, 1, 9, 20.25, 9801, 0.0064] 0 1 9 20.25 9801 0.0064
Map vs for loop
- Comparing performance , map() wins! map() works way faster than for loop. Considering the same code above when run in this ide.
using for loop:
- for loop can be with no content, no such concept exist in map() function.
# we use the keyword 'pass'
# to simply get a for loop
# with no content
- There can be an
forloop which only runs when no
breakstatement is used. There is nothing like this in
# for loop with else condition
0 1 2 3 4 5 6 7 8 9 Finished !
- for loop can exit before too. We can do that using
breakstatement. Exiting before expected is not possible in map.
- map generates a map object, for loop does not return anything.
- syntax of map and for loop are completely different.
- for loop is for executing the same block of code for a fixed number of times, the map also does that but in a single line of code.
Let us see the differences in a tabular form -:
|1.||The map() function executes a specified function for each item in an iterable.||The for loop is used for iterating over a sequence.|
Its syntax is -:
|It is used by using for keyword.|
|3.||In this, the item is sent to the function as a parameter.||It is used to execute a set of statements, once for each item in a list, tuple, set etc.|
|4.||It takes two parameters function and iterables.|
Its syntax is -:
for var in iterable :
My Personal Notes arrow_drop_up
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