dcl I fixed bin(31,5) init(1);
I = I+.1;
The value of I is now 1.0625. This is because .1 is converted to FIXED BINARY (5,4), so that the nearest binary approximation is 0.0001B (no rounding occurs). The decimal equivalent of this is .0625. The result achieved by specifying .1000 in place of .1 would be different.