This requirement on the first digit with the %e format comes from the ISO C standard. It ensures that all the digits in the output are significant and forbids output with a precision less than requested. Signed-off-by: Vincent Lefevre <vincent@xxxxxxxxxx> --- man3/printf.3 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/man3/printf.3 b/man3/printf.3 index fb40b7077..66ad6af02 100644 --- a/man3/printf.3 +++ b/man3/printf.3 @@ -658,7 +658,8 @@ The .I double argument is rounded and converted in the style .RB [\-]d \&. ddd e \(+-dd -where there is one digit before the decimal-point character and the number +where there is one digit (which is nonzero if the argument is nonzero) +before the decimal-point character and the number of digits after it is equal to the precision; if the precision is missing, it is taken as 6; if the precision is zero, no decimal-point character appears. -- 2.23.0.rc1
