C PROGRAMMING PROGRAM • CONTROL FLOW & LOOP FORMS

Print Even Numbers Using a for Loop

Learn how to print even numbers using a for loop using a clear C program.

Beginnerfor loopIncrementRange

PROBLEM UNDERSTANDING

Input and expected output

Sample input

Sample output

2 4 6 8 10

COMPLETE C PROGRAM

Complete C implementation

#include <stdio.h>

int main(void)
{
    int limit;
    printf("Enter limit: ");
    scanf("%d", &limit);
    for (int number = 2; number <= limit; number += 2) printf("%d ", number);
    putchar('\n');
    return 0;
}

CURRENT STEP

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SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

2 4 6 8 10

0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Initialize at two and increase by two in each for-loop iteration.
Display the computed result.

Initialize at two and increase by two in each for-loop iteration.

EFFICIENCY

Time and space complexity

Time complexity

O(n)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

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Use the correct format specifier for every variable.

Check this

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.