Multiplication Table Generator - Problem

Generate and display the multiplication table for a given number from 1 to 12 in a formatted grid layout.

The table should show each multiplication result in the format: number × i = result where i ranges from 1 to 12.

Each row should be displayed on a separate line with consistent formatting.

Input & Output

Example 1 — Basic Case

$ Input: number = 7

› Output: 7 × 1 = 7 7 × 2 = 14 7 × 3 = 21 7 × 4 = 28 7 × 5 = 35 7 × 6 = 42 7 × 7 = 49 7 × 8 = 56 7 × 9 = 63 7 × 10 = 70 7 × 11 = 77 7 × 12 = 84

💡 Note: Generate multiplication table for 7: each row shows 7 multiplied by numbers 1 through 12

Example 2 — Single Digit

$ Input: number = 3

› Output: 3 × 1 = 3 3 × 2 = 6 3 × 3 = 9 3 × 4 = 12 3 × 5 = 15 3 × 6 = 18 3 × 7 = 21 3 × 8 = 24 3 × 9 = 27 3 × 10 = 30 3 × 11 = 33 3 × 12 = 36

💡 Note: Multiplication table for 3 showing all results from 3×1 to 3×12

Example 3 — Edge Case with 1

$ Input: number = 1

› Output: 1 × 1 = 1 1 × 2 = 2 1 × 3 = 3 1 × 4 = 4 1 × 5 = 5 1 × 6 = 6 1 × 7 = 7 1 × 8 = 8 1 × 9 = 9 1 × 10 = 10 1 × 11 = 11 1 × 12 = 12

💡 Note: Special case where multiplying by 1 gives the sequence 1 through 12

Constraints

0 ≤ number ≤ 100
Output must include all 12 rows
Each row format: 'number × i = result'

Visualization

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Asked in

E Educational Platforms 25 C Coding Bootcamps 20

The key insight is using a simple for loop to generate each multiplication result. Best approach uses string building for efficient I/O. Time: O(1), Space: O(1)

Common Approaches

✓ Simple Loop

⏱️ Time: O(1) Space: O(1)

Iterate through numbers 1 to 12, multiply each by the given number, and format the output as a multiplication table. This is the most straightforward approach.

String Builder Approach

⏱️ Time: O(1) Space: O(1)

Instead of printing each line immediately, build all output strings efficiently using a string builder or array, then output all at once. This reduces I/O operations.

Simple Loop — Algorithm Steps

Loop from i = 1 to 12
Calculate result = number × i
Print formatted string 'number × i = result'

Visualization

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Step-by-Step Walkthrough

Initialize Loop

Start with i = 1, target number = 7

Calculate and Format

Compute 7 × i and format as string

Repeat for All

Continue until i = 12 to complete table

Code -

solution.c — C

#include <stdio.h>
#include <stdlib.h>

void solution(int number) {
    for (int i = 1; i <= 12; i++) {
        printf("%d × %d = %d\n", number, i, number * i);
    }
}

int main() {
    int number;
    scanf("%d", &number);
    
    solution(number);
    return 0;
}

Time & Space Complexity

Time Complexity

⏱️

O(1)

Fixed loop of 12 iterations regardless of input

✓ Linear Growth

Space Complexity

O(1)

Only using a few variables, no extra data structures

✓ Linear Space

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~5 min Avg. Time

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Multiplication Table Generator - Problem

Input & Output

Constraints

Visualization

Related Problems

Common Approaches

Simple Loop — Algorithm Steps

Visualization

Code -

Time & Space Complexity

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