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7nadin3 [17]
3 years ago
15

Write the code to produce a for loop that counts down from 20 to 0 by 2’s and prints the number each time it goes through the lo

op. (python)
Computers and Technology
1 answer:
yulyashka [42]3 years ago
3 0

Explanation:

Count-controlled for loop (Three-expression for loop)

This is by far the most common type. This statement is the one used by C. The header of this kind of for loop consists of a three-parameter loop control expression. Generally it has the form:

for (A; Z; I)

A is the initialisation part, Z determines a termination expression and I is the counting expression, where the loop variable is incremented or dcremented. An example of this kind of loop is the for-loop of the programming language C:

for (i=0; i <= n; i++)

This kind of for loop is not implemented in Python!

Numeric Ranges

This kind of for loop is a simplification of the previous kind. It's a counting or enumerating loop. Starting with a start value and counting up to an end value, like for i = 1 to 100

Python doesn't use this either.

Vectorized for loops

They behave as if all iterations are executed in parallel. This means, for example, that all expressions on the right side of assignment statements get evaluated before the assignments.

Iterator-based for loop

Finally, we come to the one used by Python. This kind of a for loop iterates over an enumeration of a set of items. It is usually characterized by the use of an implicit or explicit iterator. In each iteration step a loop variable is set to a value in a sequence or other data collection. This kind of for loop is known in most Unix and Linux shells and it is the one which is implemented in Python.

Example of a simple for loop in Python:

>>> languages = ["C", "C++", "Perl", "Python"]  

>>> for x in languages:

...     print(x)

...  

C

C++

Perl

Python

>>>

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Answer:

CLS

INPUT"Enter any three numbers";a,b,c

IF a>b AND a>c THEN

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2 years ago
Write a recursive function that takes a non-negative integer as an argument and displays the same number in reverse order (i.e.
avanturin [10]

Answer:

Following are the program in C++ language

#include<iostream> // header file

using namespace std; // namespace std

int reverse(int n1); // function prototype

int main()  // main function()

{

   int num; // Variable declaration

   cout << "Enter the number" << endl;

   cin >> num; // Read the number bu the user

  cout<<"After Reverse the digit:\n";

   int res= reverse(num); // calling function reverse

   

   cout<<res; // display  

}

int reverse(int n1) // function definition of reverse

{

   if (n1<10)  // checking the base condition

       {

           return n1;

       }

   else

       {

           cout << n1 % 10; // Printed the last digit

          return reverse(n1/10); // calling itsself

}

}

Output:

Enter the number:

76538

After Reverse the digit:

83567

Explanation:

Following are the description of the program

  • In the main function read the number by user in the "num" variable of int type.
  • Calling the reverse and pass that "num" variable into it.
  • After calling the control moves to the body of the reverse function.In this function we check the two condition

        1  base condition

   if (n1<10)  // checking the base condition

       {

           return n1;

     }

      2  General condition

  else

       {

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          return reverse(n1/10); // calling itsself

       }

  • Finally return the reverse number and display them into the main function.
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