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Author: CodingCossack

Learning/7. Challenges/3. Functions/prime-numbers.c

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+// Program to find all the prime numbers between two intervals using a function.
+
+#include <stdio.h>
+
+int isPrime (int number) {// ----------- create a function that checks if a number is prime or not
+ 
+ int flag = 0;// ------------------- create flag variable with value 0
+
+ for (int i = 2; i < number; i++) {
+ if (number % i == 0) {// --- run loop from 2 to number - 1
+ flag = 1;// ------- check if number is divisible by number between 2 to number - 1
+ break;
+ }
+ else {
+ flag = 0;
+ }
+ }
+ if (flag == 0) {// ------- check if flag is 0 which is condition isolated for prime number
+ printf("%d\n", number);// --- print prime number and add new line
+ }
+}
+
+int main() {
+ 
+ int x, y;
+ scanf("%d %d", &x, &y);
+ 
+ for (int i = x; i <= y; ++i) {// run the loop from x to y
+ isPrime(i);// for each iteration of loop call isPrime()
+ }
+ 
+ return 0;
+}