Counting number of elements in an array in Julia – count() Method
The count() is an inbuilt function in julia which is used to count the number of elements in the specified array for which the given predicate p returns true and if p is omitted, counts the number of true elements in the given collection of boolean values.
Syntax:
count(p, itr)
or
count(itr)Parameters:
- p: Specified set of instructions.
- itr: Specified collection of boolean values.
Returns: It returns the count of the number of elements in the specified array for which the given predicate p returns true and if p is omitted, counts the number of true elements in the given collection of boolean values.
Example 1:
# Julia program to illustrate # the use of count() method # Getting the count of the number # of elements in the specified array # for which the given predicate p # returns true. println(count(i->(i<= 3), [1, 2, 3, 4, 5])) println(count(i->(i>3), [1, 2, 3, 4, 5])) println(count(i->(2<= i<= 5), [1, 2, 3, 4, 5])) println(count(i->(i>= 0), [1, 2, 3])) |
Output:
3 2 4 3
Example 2:
# Julia program to illustrate # the use of count() method # Getting the counts of number of true elements # in the given collection of boolean values. println(count([false, false, false])) println(count([true, false, true])) println(count([true, true, true])) |
Output:
0 2 3