Checking for true values in an array in Julia - any() and all() Methods Last Updated : 12 Jul, 2025 Summarize Comments Improve Suggest changes Share Like Article Like Report The any() is an inbuilt function in julia which is used to test whether any elements of the specified boolean collection are true and if any of the input value is 'missing', it will return missing if all non-missing values are false. Syntax: any(itr) Parameters: itr: Specified boolean collection. Returns: It returns true if any of the value of specified boolean collection is true. And also return missing value if all non-missing values are false in the boolean collection. Example 1: Python # Julia program to illustrate # the use of any() method # Getting true if any of the value # of specified boolean collection is # true. And also return missing value # if all non-missing values are false # in the boolean collection. println(any([true, false, true, false])) println(any([true, true, true, true])) println(any([false, false, false, false])) println(any([missing, true, true])) println(any([false, missing, true])) println(any([false, missing, false])) Output: all()all() is an inbuilt function in julia which is used to test whether any elements of the specified boolean collection are true and if any of the input value is 'missing', it will return missing if all non-missing values are true. Syntax: all(itr) Parameters: itr: Specified boolean collection. Returns: It returns false if any of the value of specified boolean collection is false. And also return missing value if all non-missing values are true in the boolean collection. Example 1: Python # Julia program to illustrate # the use of all() method # Getting false if any of the value # of specified boolean collection is # false. And also return missing value # if all non-missing values are true # in the boolean collection. println(all([true, false, true, false])) println(all([true, true, true, true])) println(all([false, false, false, false])) println(all([missing, true, true])) println(all([false, missing, true])) println(all([false, missing, false])) Output: Comment More infoAdvertise with us Next Article Check if a specific index of an array contains a value in Julia - isassigned() Method K Kanchan_Ray Follow Improve Article Tags : Julia Similar Reads Get all array elements with true values in Julia | Array findall() Method The findall() is an inbuilt function in julia which is used to return a vector of indices or keys of the all true values from the specified array A. If such true values are not present in the array, return an empty array. Here values of index or key start from 1 i.e, for index of 1st element is 1, i 2 min read Check if a specific index of an array contains a value in Julia - isassigned() Method The isassigned() is an inbuilt function in julia which is used to test whether the given index contains a value in the specified array or not. Syntax: isassigned(array, i) Parameters: array: Specified array i: Specified index value Returns: It returns true if the specified index value is present in 2 min read Get previous true value from a given array index in Julia | Array findprev() Method The findprev() is an inbuilt function in julia which is used to return the previous index before or including i of a true element of the specified array A, or returns zero if true value is not found. Here values of index or key start from 1 i.e, for index of 1st element is 1, index of 2nd element is 2 min read Get index of first true value of array in Julia | Array findfirst() Method The findfirst() is an inbuilt function in julia which is used to return the index or key of the first true value in the specified array. Here values of index or key start from 1 i.e, for index of 1st element is 1, index of 2nd element is 2 and so on. Syntax: findfirst(A) or findfirst(predicate::Func 2 min read Get next true value from a given array index in Julia | Array findnext() Method The findnext() is an inbuilt function in julia which is used to return the next coming index after or including i of a true element of the specified array A, or returns zero if true value is not found. Here values of index or key start from 1 i.e, for index of 1st element is 1, index of 2nd element 2 min read Fill an array with specific values in Julia | Array fill() method The fill() is an inbuilt function in julia which is used to return an array of specified dimensions filled with a specific value passed to it as parameter. Syntax: fill(Value, Dimension)Parameters:  Value: To be filled in the arrayDimension: Required size of the array Returns: It returns an array 2 min read Like