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Sia ? 3 years, 5 months ago
| Global variables are declared outside all the function blocks. | Local Variables are declared within a function block. |
| The scope remains throughout the program. | The scope is limited and remains within the function only in which they are declared. |
| Any change in global variable affects the whole program, wherever it is being used. | Any change in the local variable does not affect other functions of the program. |
| A global variable exists in the program for the entire time the program is executed. | A local variable is created when the function is executed, and once the execution is finished, the variable is destroyed. |
| It can be accessed throughout the program by all the functions present in the program. | It can only be accessed by the function statements in which it is declared and not by the other functions. |
| If the global variable is not initialized, it takes zero by default. | If the local variable is not initialized, it takes the garbage value by default. |
| Global variables are stored in the data segment of memory. | Local variables are stored in a stack in memory. |
| We cannot declare many variables with the same name. | We can declare various variables with the same name but in other functions. |
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Sia ? 3 years, 5 months ago
| BASIS FOR COMPARISON | WHILE | DO-WHILE |
| General Form | while ( condition) { statements; //body of loop } |
do{ . statements; // body of loop. . } while( Condition ); |
| Controlling Condition | In 'while' loop the controlling condition appears at the start of the loop. | In 'do-while' loop the controlling condition appears at the end of the loop. |
| Iterations | The iterations do not occur if, the condition at the first iteration, appears false. | The iteration occurs at least once even if the condition is false at the first iteration. |
| Alternate name | Entry-controlled loop | Exit-controlled loop |
| Semi-colon | Not used | Used at the end of the loop |
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Anupma Kumari 6 years, 9 months ago
0Thank You