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#include<stdio.h> main() { int iNumber, initial= 2; printf("Enter a number to check :\n"); scanf("%d",&iNumber); for ( initial = 2 ; initial <= iNumber - 1 ; initial++ ) { if ( iNumber%initial == 0 ) { printf("%d is not a prime number.\n", iNumber); break; } } if ( initial == iNumber ) printf("%d is prime number.\n", iNumber); return 0; }