1BEGIN {
2	CONVFMT = "%2.2f"
3	a = 123.456
4	b = a ""                # give `a' string value also
5	printf "a = %s\n", a
6	CONVFMT = "%.6g"
7	printf "a = %s\n", a
8	a += 0                  # make `a' numeric only again
9	printf "a = %s\n", a    # use `a' as string
10}
11