C PROGRAMMING PROGRAM • ARRAYS, SEARCHING & SORTING

Count Positive, Negative and Zero Array Elements

Learn how to count positive, negative and zero array elements using a clear C program.

BeginnerArraysLoopsIndexing

PROBLEM UNDERSTANDING

Input and expected output

Sample input

7
-2 0 8 4 -1 0 3

Sample output

Positive = 3
Negative = 2
Zero = 2

COMPLETE C PROGRAM

Complete C implementation

#include <stdio.h>

int main(void)
{
    int size, values[100], positive = 0, negative = 0, zero = 0;

    printf("Enter array size: ");
    scanf("%d", &size);
    if (size < 1 || size > 100) return 1;
    for (int index = 0; index < size; index++) {
        scanf("%d", &values[index]);
        if (values[index] > 0) positive++;
        else if (values[index] < 0) negative++;
        else zero++;
    }
    printf("Positive = %d\nNegative = %d\nZero = %d\n", positive, negative, zero);
    return 0;
}

CURRENT STEP

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SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

Positive = 3
Negative = 2
Zero = 2

0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Use a three-way comparison for each element and increment the matching counter.
Display the computed result.

Use a three-way comparison for each element and increment the matching counter.

EFFICIENCY

Time and space complexity

Time complexity

O(n)

Auxiliary space

O(n)

DEBUGGING CHECKLIST

Common mistakes

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Use the correct format specifier for every variable.

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Initialize variables before using their values.

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Check braces, semicolons and input order carefully.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.