Check out example codes for "while loop swift". It will help you in understanding the concepts better.

Code Example 1

// runs until some boolean expression is false
while booleanExpression {
    //block of code to be executed...
}

Code Example 2

for i in 0...10 {
	print(i)
}

let array = Array(0...10) //same as [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

for value in array {
	print(value)
}

Code Example 3

var x = 0; 
while x < 10 { 
    print "\(x)" //prints x until x < 10 evaluates to false
    x = x + 1
}

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