As we will have 26 codes for 26 alphabets and now if you see that 65 to 90 is the character code for A to Z characters in ASCII. we will be able to generate codes from 65 to 90. We will generate only Upper case alphabets so, we will assign each character the code 65 and add a random integer between 0 to 25 i.e. As a byte in Golang accepts ASCII character code, we might refer to the ASCII table for understanding the code for characters we want to generate from. We will then iterate over the byte slice and populate it with random characters between a specific range.
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A byte is a datatype in go, you can learn more about it on the official docs. Next, we need to create a byte slice of predefined size. We will first define the length of the string, it can be anything you like. We can generate a random string, using some random number generation and character code arithmetic. Output: Generated character:q Generate a Random String
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We need to convert the time in seconds we do that by using the Unix function or UnixNano/UnixMilli/UnixMicro functions, which convert the time in seconds, nanoseconds, milliseconds, and microseconds respectively, simply using Unix will also work fine.īelow is a script that depicts the working of the above explanation. We also need to make sure we generate a different seed each time the program is run, to that we can use the time.Now function from time package in Golang. We will store the above output in a variable and hence we have a random character selected from a string. the provided argument to the Intn function will be the total length of the string. So with this, we can get the random index of the string and access the character with that index. So it basically takes an integer (say n) as an argument and returns any random number from 0 to n-1. The rand function has a function called Intn, which generates a random number between 0 (inclusive) to the provided number(non-inclusive). Next up, we need to randomly choose a character from the string, we can do that by importing the rand package in Golang. The above string can be anything you like to get a random character from. This will simply be a string in Go lang as we define it in double-quotes. We will use the rand module to choose a random character from the given string.įirstly, we create a string with all the sets of characters in it. Let’s say we want to get a random alphabet from a to z, we just can’t hard code them to the specific values, we need a pseudo-random way to get a character from a string.
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