Which part is confusing?

The docs state that unsigned C integers are used when use integer is not used. 2147483648 * 2 is 4294967296, and 4294967296 doesn't fit in a 32 bit unsigned int (presuming you are using a 32 bit system). Therefore, this is an overflow situation.

Futhermore, the docs also state: "The result of overflowing the range of the integers is undefined because it is undefined also in C." That means 2147483648 << 1 can return anything, and you can't rely on it always returning 1.

In reply to Re: Left shift operation done more than 32 times by ikegami
in thread Left shift operation done more than 32 times by jesuashok

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