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with the == (equality test) operator. Instead, this will assign the value of 5 to a at this point in the program. Thus, a will never be able to advance to 10, and this loop cannot terminate.

Rounding errors

Unexpected behavior in evaluating the terminating condition can also cause this problem. Here is an example in C:

float x = 0.1;while (x != 1.1) { printf("x = %22.20f\n", x); x += 0.1;}

On

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