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Python all() Function
By IncludeHelp Last updated : April 19, 2024
The all() function is a library function in Python, it is used to check whether all elements of an iterable are True or not. It accepts an iterable container and returns True if all elements are True, else it returns False.
Syntax
The following is the syntax of all() function:
all(iterable)
Parameter(s):
The following are the parameter(s):
Return Value
The return type of all() function is <class 'bool'>, it returns a Boolean value either True or False.
Examples
Example 1
Python code to check whether all elements of an iterable are true or not (printing return values).
# python code to demonstrate example
# of all() function
val = [10, 20, 30, 40] #list with all true values
print(all(val))
val = [10, 20, 0, 40] #list with a flase value
print(all(val))
val = [0, 0, 0, 0.0] #list with all false values
print(all(val))
val = [10.20, 20.30, 30.40] #list with all true(float) values
print(all(val))
val = [] #an empty list
print(all(val))
val = ["Hello", "world", "000"] #list with all true values
print(all(val))
Output
True
False
False
True
True
True
Example 2
Python code to check whether all elements of an iterable are true or not (checking using condition).
# python code to demonstrate example
# of all() function
list1 = [10, 20, 30, 40]
list2 = [10, 20, 30, 0]
# checking with condition
if all(list1)==True:
print("list1 has all true elements")
else:
print("list1 does not has all true elements")
if all(list2)==True:
print("list2 has all true elements")
else:
print("list2 does not has all true elements")
Output
list1 has all true elements
list2 does not has all true elements
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