by Dinesh Thakur Category: Control Structures

Nested for loops have many applications, particularly, in programs dealing with sorting of lists, input/output of multi-dimensional arrays, etc. and also in the evaluation of expressions involving more than one parameter. The code for nested/or loops is given below.

int i, j, k ;

for(i = 0; i<= m; i++)

    for(j = 0; j <= n; j++)

         for(k = 0 ; k <= p; k++)



The following program makes use of the nested/or loop to evaluate ex for different integral values of x (x = 1 to x = 4) by summing the first 10 terms of the following series for each value of x:


In the evaluation there would be two loops: In the inner loop, we calculate the value of the series for a particular value of x, i.e., the first 10 terms is summed up for a value of x. This calculation is repeated for different values of x from x = 0 to x = 4. Program is an example of the required program.

Illustrates evaluation of ex for integer powers of x from 0 to 4.

#include <stdio.h>

void main()
   int n = 10,x ,m;
   float Sum, Term;
   for(x =0; x<5; x++)
       Term = 1;
       Sum = Term;
       for( m = 1; m<=n; m++)
            Term = Term *x/m;
            Sum= Sum+ Term;
       printf("e to power %d = %f\n", x, Sum);

The output is given below.

      Nested FOR Loops in C

About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.

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