X: Unsigned integer in hexadecimal form, and the hexadecimal characters A, B, C, D, E, and F printed in uppercase. : printf hexadecimal « printf scanf « C Tutorial

1. C Tutorial
2. printf scanf
3. printf hexadecimal

#include <stdio.h>
main()
{
    int i = 100;
    printf(" %X\n",i);
}

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