How to add the % symbol directly after a variable call in Obj C?

I have a program that calculates some user input, and I would like to show it as a percent. I just need to know how to put the '%' symbol in my code without it crashing on me.

Using,

l开发者_如何学编程blUserTypedName.text = [[NSString alloc] initWithFormat: @"%2.1f", ultimate_risk];

Prints out a number, like 18.4. I would like for it to print out 18.4%. I've tried the following

lblUserTypedName.text = [[NSString alloc] initWithFormat: @"%2.1f%", ultimate_risk];

and it doesn't print the '%' symbol. I've tried the following.

lblUserTypedName.text = [[NSString alloc] initWithFormat: @"%2.1f\%\", ultimate_risk];

with no luck.

What am I missing here?

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Use "%%" to print a single "%". That is,

lblUserTypedName.text = [[NSString alloc] initWithFormat: @"%2.1f%%", ultimate_risk];

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Search the docs in Xcode for "String format specifiers". You'll find a full list of them there.