The while loop has two important parts: an expression that is tested for a true or false value, and:
a.
a statement or block that is repeated as long as the expression is true
b.
a statement or block that is repeated only if the expression is false
c.
one line of code that is repeated once, if the expression is true
d.
a statement or block that is repeated once, if the expression is true

The correct answer for the given question is option(A) i,e a statement or block that is repeated as long as the expression is true.

Explanation:

While loop is an entry control loop it means if the condition in while loop is true then the statement inside the while loop is executed untill condition of while loop is false .

Following are the syntax of while loop

while(condition checking)

{

// statement

// increment or dec variable;

}

Let us consider an example of while loop

Following are the program in c++

#include<iostream> // header file

using namespace std; //namespace

void main() // main method

{

int k=1; // variable declarartion

while(k<5) // iterating over loop

{

cout<<"hello :";

k++; // increment of k by 1

}

}

In the following code the variable k is initialized by 1 so 1<5 condition is "true" it executed the statement  inside the loop that menas when k=1 it print hello : after printed the message  hello : it increment the value of k by 1, Now k becomes "2" again 2<5 condition is "true "it executed the statement again .This process will continue untill k=5 when k=5 the condition is "false" it terminate the while loop.

Output

hello :hello :hello :hello :hello :

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