C Exercises: Print the powers of 2 table for the power 0 to 10

Last update on September 18 2025 12:35:30 (UTC/GMT +8 hours)

Print powers of 2

Write a C program that prints the powers of 2 table for the powers 0 to 10, both positive and negative.

Visualization of powers of two from 1 to 1024:

Sample Solution:

C Code:

#include<stdio.h>
int main() {
    long int p;
    int n;
    double q;
    
    // Print table header
    printf("\n=======================================");
    printf("\n n    2 to power n      2 to power -n");
    printf("\n=======================================");
    
    p = 1;
    
    // Generate table
    for (n = 0; n < 11; ++n) {
        if (n == 0)
            p = 1;
        else
            p = p * 2;
        q = 1.0 / (double) p;
        printf("\n%2d   %8d     %20.12lf", n, p, q);
    }
    
    // Print table footer
    printf("\n======================================");
    
    return 0;
}

Sample Output:

=======================================
 n    2 to power n      2 to power -n
=======================================
 0          1           1.000000000000
 1          2           0.500000000000
 2          4           0.250000000000
 3          8           0.125000000000
 4         16           0.062500000000
 5         32           0.031250000000
 6         64           0.015625000000
 7        128           0.007812500000
 8        256           0.003906250000
 9        512           0.001953125000
10       1024           0.000976562500
======================================

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C program to print a table of powers of 2 up to 2^15 along with their binary representations.
• Write a C program to print both positive and negative powers of 2 using recursion.
• Write a C program to compute and display powers of 2 in descending order starting from 2^10.
• Write a C program to print powers of 2 and their logarithms in a formatted table.

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