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42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/*
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* C program to find prime numbers in a given range.
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* Also print the number of prime numbers.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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void main()
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{
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int num1, num2, i, j, flag, temp, count = 0;
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printf("Enter the value of num1 and num2 \n");
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scanf("%d %d", &num1, &num2);
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if (num2 < 2)
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{
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printf("There are no primes upto %d\n", num2);
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exit(0);
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}
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printf("Prime numbers are \n");
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temp = num1;
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if ( num1 % 2 == 0)
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{
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num1++;
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}
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for (i = num1; i <= num2; i = i + 2)
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{
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flag = 0;
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for (j = 2; j <= i / 2; j++)
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{
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if ((i % j) == 0)
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{
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flag = 1;
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break;
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}
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}
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if (flag == 0)
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{
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printf("%d\n", i);
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count++;
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}
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}
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printf("Number of primes between %d & %d = %d\n", temp, num2, count);
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} |