Getting last element of an array in Julia - last() Method

Counting number of elements in an array in Julia – count() Method

Last Updated : 26 Mar, 2020

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:

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

Getting last element of an array in Julia - last() Method

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