whileLoop

If a loop does not have a way of stopping, it is called an infinite loop.

Of the following which one is NOT infinite loop?

• while (number < 5) ;

  { cout << "Hello" ;

  number++; }

• int number = 0 ;

  while (number < 5)

  { cout < "Hello"; }

• while (number < 5)

  cout < "Hello";

  number++;

• while (number < 5)

  { cout < "Hello";

  number++; }

What is the result of this while loop ?

int number = 0;

while (number < 5)

{ cout << "Hello\n";

number++ ; }

• Hello

  Hello

  Hello

  Hello

  Hello

  Hello

  Hello

• HelloHelloHelloHello

• Hello

  Hello

  Hello

  Hello

  Hello

• Hello

  Hello

  Hello

  Hello

While loop will never iterate, if the test expression is false to start with.

T / F ?

• TRUE

• FALSE

in the test expression(condition), any NONZERO value is evaluated as true.

T / F ?

• FALSE

• TRUE

The while loop is especially useful for validating input. If an invalid value is entered, a loop can require that the user reenter it as many times as necessary.

Which one is a while Loop for Input Validation?

• 
• 
•