iOS Development Learning Record the 8th day of C language learning-----logical operators

I. Introduction to logical operators

1. Logical operator:&& (with) | | (OR)! (non)

The formula:&& is true, a false is False

|| The truth is true, a false is False

！ False is True, True is False

2, we use the following example to see the specific details:

#include <stdio.h>int main (int argc, const char * argv[]) {    //define two int type variable    int num1=2,num2=3;        if (num1>0 && num2>0) {        printf ("Num1 and num2&& results are true \ n");//Here is a description of num1,num2 is greater than 0    }    if ( Num1>0 && num2<0) {        printf ("Num1 is true, Num2 is false, num1&&num2, the final result is false \ n");//Not printed    }    if ( num1>0 | | num2<0) {        printf ("Num1 is true, Num2 is false, num1| | NUM2, the final result is true \ n ");//This will be printed out    }            if (num1>0) {        printf (" Here is true \ n ");//This will be printed    }    // We can now print out the value of!num1    printf ("%d\n",!num1),//!num1 with a value of 0        if (!num1>0) {        printf ("Here is false \ n");//This will not print  because num1>0   but the value of!NUM1 is 0    0>0 false    }    if (!num1==0) {        printf ("Here is true \ n");//This will be printed    }                return 0;}

iOS Development Learning Record the 8th day of C language learning-----logical operators