Until in Groovy

In Groovy, the until keyword is used in loops to execute a block of code repeatedly until a certain condition is met. The syntax for using until is as follows:

while (expression) {
    // code block to execute
}

Here, the expression is any logical expression that can be evaluated to false. Once the expression is evaluated to false, the loop stops.

Here's an example of how to use until in Groovy:

def count = 0
until (count == 5) {
    println(count)
    count++
}

In this example, the loop will run until the value of count is equal to 5. The println statement inside the loop will print the value of count in each iteration. Once count is equal to 5, the until loop will stop and the program will move on to the next line of code.

Another example of using until in Groovy is to iterate over a list:

def myList = [1, 2, 3, 4, 5]
for (i in 0.until(myList.size())) {
    println(myList[i])
}

In this example, the loop will iterate over each element of the myList list until it reaches the end of the list (as determined by myList.size()). The println statement inside the loop will print each element of the list in each iteration.

Note that the until keyword in Groovy is similar to the while keyword, but with the condition being negated. Therefore, the loop is executed as long as the condition is false.