IRAF help page for package language, program while

while -- while loop construct

while (expression) statement

Required keyword.

A boolean valued expression tested before each iteration.

A statement (possibly compound) to be executed in each iteration of the loop.

The while loop executes the enclosed statements while the specified condition is true.

1. An infinite loop.

	while (yes) {
	    sleep 30
	    time
	}

2. Type a file.

	list = "home$login.cl"
	while (fscan (list, line) != EOF)
	    print (line)