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Thursday, May 10, 2018

Python Loops

Python Language Loops

In general, statements are executed sequentially inwards Computer programming, 

Programming languages supply diverse command structures that permit for more 
complicated execution paths.

A loop disceptation allows us to execute a disceptation or grouping of statements multiple times.

Python programming linguistic communication provides ii loop structues,

1) piece loop
2) for loop to handgrip loop requirements...
---------------------------------
1) piece loop

It repeatedly executes statements piece status is true...

Syntax:

while (condition/expression):
  statement(s);

Example one - Print one to x Numbers.

a=1;
while (a<=10):
    print(a);
    a=a+1;
Output:
1
2
3
4
5
6
7
8
9
10
------------------
Example 2: Read a Number, too calculate sum, too Zero to quit from the loop

a=1;
sum=0;

print ("Enter a Number to add together to the sum: ");
print ("Enter 0 to quit.");

while a != 0:
    impress ("Current Sum: ", sum);
    a= float(input("Enter Number: "));
    a=float(a);
    amount += a;
print("Total Sum is: ", sum);
----------------------------------
3) Example 3: Print one to five Numbers inwards opposite order...

val=5;
while (val >= 1):
  print(val);
  val = val-1;

Output:
5
4
3
2

1
----------------------------------
 statements are executed sequentially inwards Computer programming Python Loops
2) for loop

for loop iterates over the items of whatever sequence, such equally a listing or a string.

Syntax:

for iterating_var inwards sequence:
   statement(s);

Example 1:
a= [2, 4, 6, 8, 10, 12, 14];

for num inwards a:
   print(num);

Output:
2
4
6
8
10
12
14
------------------------
Example 2:
for num inwards range(5):
  print(num);

output:
0
1
2
3
4
--------
Note: If you lot create postulate to iterate over a sequence of numbers, the built-in function range() comes inwards handy. It generates arithmetics progressions.
-----------------------------------
Note: nosotros tin utilisation conditional statements solely inwards our script, or loop statements only, or nosotros tin insert loops inwards Conditional statements too vice versa.
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Sumber http://www.gcreddy.com/

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