How not to execute else statement of for-loop when if statement is satisfied at least once?

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I am trying to check all elements in a list to see if they meet the condition "less than 5". What I'm trying to do is if no numbers in my list are less than 5, I want to print a statement "There are no elements in this list less than 5.", otherwise print only those numbers that are, and not "There are no elements in this list less than 5." also.

list = [100, 2, 1, 3000]
for x in list:
    if int(x) < 5:
        print(x)
else:
    print("There are no elements in this list less than 5.")

This produces the output:

2
1
There are no elements in this list less than 5.

How can I get rid of the last line of that output?

The else of a for-loop will only be skipped if a break was encountered. Thus, a for-else statement is not appropriate for finding multiple elements in a list.

Instead, use a list-comprehension and print accordingly based on the result.

lst = [100, 2, 1, 3000]

less_than_five = [x for x in lst if x <  5]

if less_than_five:
    print(*less_than_five)
else:
    print('There are no elements in this list greater than 5.')

Into the Realm of Oberon: An Introduction to Programming and the , If the IF statement's guarding condition is satisfied, then the EXIT causes execution to resume with the next statement following the END of the LOOP. Char(ch) once before the loop—to ensure that there is at least one character able to be The WHILE's statements may not be executed at all, depending on whether the  The else of a for-loop will only be skipped if a break was encountered. Thus, a for-else statement is not appropriate for finding multiple elements in a list. Instead, use a list-comprehension and print accordingly based on the result.

Keep a boolean flag outside the loop. Set it to true if at least one element is found. If the flag does not change- print out your statement about no elements being found greater than 5:

list = [100, 2, 1, 3000]
found = False
for x in list:
  if int(x) < 5:
    print(x)
    found = True

if found == False:
  print("There are no elements in this list greater than 5")     

Loops: while and for, If i++ was missing from the example above, the loop would repeat (in theory) forever. can be a loop condition, not just comparisons: the condition is evaluated and The loop will first execute the body, then check the condition, and, loop to execute at least once regardless of the condition being truthy. A for loop normally performs which of these steps? a. initializes a control variable to a starting value b. tests the control variable by comparing it to a maximum/minimum value and terminate when the variable reaches that value

You could do something like:

if max(mylist) < 5:
    print('there are no elements in this list greater than 5')
else:
    for x in mylist:
        if int(x) < 5:
            print(x)

This checks if your list contains anything greater than 5 before anything, and if there is, then it runs your loop.

Discrete and Continuous Simulation: Theory and Practice, The set of statements under a while loop get executed if the condition of the while loop is satisfied. If the condition is satisfied, then a set of statements is executed​. not modified, then the loop runs infinitely until the user stops the execution of to set some compulsory decisions that will have to be executed at least once. a) a switch statement with assignment statements for its case statements b) one or more ifs with else clauses and assignment statements for its true and false clauses. c) one or more nested while loops with assignments for the bodies of the loops. d) one or more ifs without any else clauses and assignment statements for its yes_statement(s).

What you need is some sort of flag to keep track whether condition was met like in the code below. list = [100, 2, 1, 3000] flag = False for x in list: if int(x) < 5: print(x) flag = True if not flag: print("There are no elements in this list greater than 5.")

Programming with Java, Loop Ends In this program, if we substitute continue statement with the break of times or until some condition is satisfied are known as iteration statements. The do-while loop is used if the body of the loop is to be executed at least once, no matter The ______ operator can be used as an alternative to if-else statement. A break statement is legal in a while loop, but not in a for loop. The body of a dowhile loop may not execute at all. The dowhile loop has an exit condition but no entry condition. In ____ structures, the computer repeats particular statements a certain number of times depending on some condition (s).

Computer Studies for Engineering Students, Thus this type of loop executes the tasks given, at least for once. If the condition is not satisfied, the control is exited from the loop. The main If the defined condition becomes true, then, it will be continued, otherwise it wil be stopped. Example  A DO-WHILE loop will always execute the code at least once, even if the conditional statement for the WHILE is never true. A WHILE loop is only executed if the conditional statement is true. A DO-WHILE loop includes an int that serves as a counter and a WHILE loop does not.

Rudiments of Computer Science, The condition part of the for loop does not contain any parameter, however the The if statement in line5 is used to check the condition and the break statement in line6 is used to break out of the loop once the condition in line5 gets satisfied. the do-while loop will execute at least once before testing the condition as the  The statements are repeated either while a condition is True or until a condition becomes True. Repeating statements while a condition is True. There are two ways to use the While keyword to check a condition in a DoLoop statement. You can check the condition before you enter the loop, or you can check it after the loop has run at least once.

Developing Visual Studio .NET Macros and Add-Ins, The lines that follow are those the While loop executes while the condition is True​. inside the block always run at least once, even if the condition is not satisfied. loop starts with the keyword For, then the variable that serves as the counter,  We use do/while when we want the code block to execute at least once, before testing the while condition. This differs from while {..}, in that its code block may not execute at all if the condition is not true.

Comments
  • This will result in iterating through the list twice, once to find the max and once to do the prints
  • Can you explain a little more in detail how the flag works, or maybe direct me somewhere where I can learn myself?
  • The flag is simply a boolean trigger that will only turn True if at least one of the values satisfies the under 5 criteria.