Variables and Expressions

Variable Declaration
Variables should be declared either outside a function or at the start of a block of code,
after the opening { and before any other statements. See section 7.1 for further
details. They must be declared before use and the type must normally be specified
(exceptions are external and static declarations where the type int is implicit, see
section 7.2).
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int miles, yards; /* global variables */
main()
{
float kilometres; /* local variables */
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