Help with format string in scanf?

The space at the end of the format string tells scanf to eat whitespace after the first integer. It's not actually accepting a second input. When you do enter a second value, scanf sees that the whitespace is finished it returns, storing the first integer into your variable i.

The "second input" is still in the standard input stream.

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C link|improve this question asked Sep 23 '11 at 21:46Bruce2,036940 87% accept rate.

When do I need to eat the whitespace. Please give an example. – Bruce Sep 23 '11 at 22:04 You don't have to eat the whitespace.

You are instructing scanf to eat any whitespace after it reads the integer. Until scanf sees either an EOF or something other than whitespace, it can't return. – David Nehme Sep 23 '11 at 22:12.

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