While loop with sentinel-controlled repetiton. : While : Language Basics PYTHON examples

While loop with sentinel-controlled repetiton.

total = 0           gradeCounter = 0    grade = raw_input( "Enter grade, -1 to end: " )   # get one grade grade = int( grade )                              # convert string to an integer while grade != -1:    total = total + grade    gradeCounter = gradeCounter + 1    grade = raw_input( "Enter grade, -1 to end: " )    grade = int( grade ) if gradeCounter != 0:    average = float( total ) / gradeCounter    print "Class average is", average else:    print "No grades were entered"

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