C program check if an integer is prime or not
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#include <stdio.h>
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int main()
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{
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int n, c;
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printf(“Enter a number\n”);
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scanf(“%d”, &n);
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if (n == 2)
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printf(“Prime number.\n”);
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else
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{
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for (c = 2; c <= n – 1; c++)
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{
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if (n % c == 0)
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break;
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}
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if (c != n)
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printf(“Not prime.\n”);
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else
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printf(“Prime number.\n”);
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}
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return 0;
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}
