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Hence, If there are N elements in the array, then the linear search would take N steps. Linear search in C to find whether a number is present in an array. Linear Search in C programming Linear search is a searching algorithm which is used to detect the presence of a number in an array and if present, it locates its position in that array. The linear search also sometimes known as Sequential search. It is straightforward and works as follows: we compare each element with the element to search until we find it or the list ends. In this blog on “Linear search in C”, we will implement a C Program that finds the position of an element in an array using a Linear Search Algorithm. Let's now examine the efficiency of Linear search in term of Big O Notation. In linear search, we start searching for the target item at the beginning of the array. The linear search also sometimes known as Sequential search. If the target is equal to the element at index 0, then we have found the target. Otherwise, we keep looking for the target until we have reached the end of the array. It is also known as a sequential search. In general, we can say that in the worst-case scenario the linear search will take as many steps as there are elements in the array. In a worst-case scenario, if there are 100 elements in the array then the linear search will take 100 steps. The above statement can be expressed in terms of Big-O notation as follows: Keep in mind that in plain English, O(N) simply means for N number of elements, an algorithm would take N number of steps.eval(ez_write_tag([[250,250],'overiq_com-medrectangle-4','ezslot_5',136,'0','0'])); The following is a C program to search for the target using Linear search algorithm: In line 13, we ask the user to input a number to be searched. Otherwise, we keep searching for the target one by one in the array until a match is found. Similarly, if there are 10 million elements in the array, then the linear search will take 10 million steps. 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Linear search is a very simple and basic search algorithm. In linear search, we start searching for the target item at the beginning of the array. If the target is equal to the element at index 0, then we have found the target. Installing GoAccess (A Real-time web log analyzer). The scanf() function in line 14 reads the input from the keyboard and stores it in the variable named target. C Program to check whether the number is even or odd. The if-else statement in lines 27-34 checks the value of is_found variable to determine whether we have found the target or not and displays the appropriate message. If the target is equal to the current element in the array, we set is_found to 1 and break out of the for loop using the break statement. /***************************************************, * Program to search for an item using Linear Search, ****************************************************/, // if target is found stop the search and break out, // signal to operating system everything works fine, C Program to sum the elements of an array, C Program to find the count of even and odd elements in the array, C Program to find the transpose of a matrix, C Program to find the sum of digits of a number, C Program to find the factorial of a number, C Program to find the sum of the digits of a number untill the sum is reduced to a single digit, C Program to count number of digits in a number, C Program to reverse the digits of a number, C Program to find the sum of natural numbers upto N terms. What is if __name__ == '__main__' in Python ? 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