Sums of integers with a while loop nested in a for loop - C Statement

C examples for Statement:while

  1. HOME
  2. C
  3. Statement
  4. while

Description

Sums of integers with a while loop nested in a for loop

Demo Code

#include <stdio.h>

int main(void){
  unsigned long sum = 1UL;         // Stores the sum of integers
  unsigned int j = 1U;             // Inner loop control variable
  unsigned int count = 0;          // Number of sums to be calculated

  // Prompt for, and read the input count
  printf("\nEnter the number of integers you want to sum: ");
  scanf(" %u", &count);

  for(unsigned int i = 1 ; i <= count ; ++i) {
    sum = 1UL;                     // Initialize sum for the inner loop
    j=1;                           // Initialize integer to be added
    printf("\n1");

    // Calculate sum of integers from 1 to i
    while(j < i)
    {//from   w  w  w  .j a v a2 s  . c  o  m
      sum += ++j;
      printf(" + %u", j);          // Output +j - on the same line
    }
    printf(" = %lu", sum);         // Output  = sum
  }
  printf("\n");
  return 0;
}

Result


Related Tutorials