4.70 Mixed declarations and statements in C99

C99 enables you to mix declarations and statements within compound statements, like in C++.

For example:
void foo(float i)
{
    i = (i > 0) ? -i : i;
    float j = sqrt(i);    // illegal in C90
}
Related concepts
4.59 New language features of C99
4.61 // comments in C99 and C90
4.62 Compound literals in C99
4.63 Designated initializers in C99
4.64 Hexadecimal floating-point numbers in C99
4.65 Flexible array members in C99
4.66 __func__ predefined identifier in C99
4.67 inline functions in C99
4.68 long long data type in C99 and C90
4.69 Macros with a variable number of arguments in C99
4.71 New block scopes for selection and iteration statements in C99
4.72 _Pragma preprocessing operator in C99
4.73 Restricted pointers in C99
4.75 Complex numbers in C99
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