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Prg 420 Week 3 Supporting Activity 1

In: Computers and Technology

Submitted By peacebear241
Words 273
Pages 2
There are 3 kinds of loops—for loop, while loop, and do while loop. Under which circumstances would each kind of loop be more appropriate? Explain your answers using specific examples.

For loop- The for loop is best used when the number of iterations is known. The for loop is best used to repeat the loop a fixed number of times. The Boolean-expression is tested at the beginning of the loop. The for loop has the form: for (initialization; Boolean-expression; increment) {nested statements }.
A for loop can be used to show every number divisible by 3 between 1 and 60.
For (int num=0; num , 60; num++) { If (num % 3 == 0) { System.out.println( “#: “ + dex);
}
}
While loop- While loops are best used when the exiting condition has nothing to do with the number of loops. The While loop tests the Boolean-expression at the beginning of the loop. It is in the form :
While (Boolean-expression) { nested statements}
The while loop can be used to prompt the user until the exit variable (any negative number) is entered. while ( input > 0) {
System.out.println(“Please enter number. Enter negative number to exit.”) }
Do while loop- It is best to use the do while loop when the iteration must be executed at least once. The do while loop tests the Boolean-expression at the end of the loop. It has the form: do { nested statements } while (Boolean-expression);
The do while loop can be used to show the same message multiple times. int tries = 3; int count = 1; do { System.out.println( “Incorrect password. Try again”); Count++;
} while (count <...

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