二、資料型別和表示式

 #import <Foundation/Foundation.h>

  int main(int argc, const char * argv[]){
  @autoreleasepool {
        //int 型別
        int integerVar = 1;
        NSLog(@"int integerVar = %i",integerVar);
        //float
        float floatVar = 2.01;
        NSLog(@"float floatVar =  %f or %g",floatVar,floatVar);
        //double 儲存的範圍大概是float的兩倍
        double doubleVar = 3.00001e-10;
        NSLog(@"double doubleVar = %e",doubleVar);
        char c = 'A';
        NSLog(@"char c = %c",c);
        }
        return 0;

        }