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I have list l like list<pair<int,int>> . How to check if x
pair<int,int> x=make_pair(5,6) is in list l ?
251
We can use the in-built python List method, count(), to check if the passed element exists in the List. If the passed element exists in the List, the count() method will show the number of times it occurs in the entire list. If it is a non-zero positive number, it means an element exists in the List.
Use the not in operator to check if an element is not in a list. Use the syntax element not in list to return True if element is not in list and False otherwise.
Python Find String in List using count() We can also use count() function to get the number of occurrences of a string in the list. If its output is 0, then it means that string is not present in the list. l1 = ['A', 'B', 'C', 'D', 'A', 'A', 'C'] s = 'A' count = l1.
Use std::find:
std::find(l.begin(), l.end(), x) != l.end()
Use std::find:
auto it = std::find(lst.begin(), lst.end(), x);
if ( it != lst.end() )
{
//x found
}
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