22 lines
420 B
C
22 lines
420 B
C
#include <stdio.h>
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int main(void) {
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puts("Show all prime numbers until: ");
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int i;
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if(scanf("%d", &i) != 1 || i < 2) {
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puts("ERROR, entered integer NOT valid!");
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}
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for(int y = 2; y < i; y++) {
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int counter = 0;
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for(int a = 2; a < y; a++) {
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if(y % a == 0) {
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counter = 1;
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}
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}
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if (!counter) {
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printf("%d\t", y);
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}
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}
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}
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