Generate prime checks using while loops (while) Dry Run in C

Generate prime checks using while loops (while) is an interactive C dry run visualizer from the Nested programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Generate prime checks using while loops (while) Program Code

#include <stdio.h>
int main() {
    int start, end;
    printf("Enter range (start end): ");
    scanf("%d %d", &start, &end);
    
    printf("Prime numbers using while loops:\n");
    int num = start;
    
    while(num <= end) {
        if(num < 2) {
            num++;
            continue;
        }
        
        int isPrime = 1;
        int i = 2;
        while(i * i <= num) {
            if(num % i == 0) {
                isPrime = 0;
                break;
            }
            i++;
        }
        
        if(isPrime) printf("%d ", num);
        num++;
    }
    return 0;
}

View the complete Nested programs page.